Section Pspoly.
Load "hCoefStructure".
Load "hOrderStructure".
Load "hReducestar".
Definition spolyf :
forall (p q : list (Term A n)) (Cp : canonical A0 eqA ltM p)
(Cq : canonical A0 eqA ltM q), list (Term A n).
intros p1; case p1.
intros p2 H' H'0; exact (pO A n).
intros a p11 p2; case p2.
intros H' H'0; exact (pO A n).
intros b p22 H' H'0.
apply LetP with (A := Term A n) (h := ppc (A:=A) A1 (n:=n) a b).
intros u H'1.
cut (~ zeroP (A:=A) A0 eqA (n:=n) a);
[ intros nZa | apply canonical_nzeroP with (ltM := ltM) (p := p11); auto ].
cut (~ zeroP (A:=A) A0 eqA (n:=n) b);
[ intros nZb | apply canonical_nzeroP with (ltM := ltM) (p := p22); auto ].
exact
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) u (b:=a) nZa) p11)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) u (b:=b) nZb) p22)).
Defined.
intros p; case p; simpl in |- *; auto.
intros a l q; case q; unfold LetP in |- *; simpl in |- *; auto.
intros a0 l0 H' H'0.
cut (canonical A0 eqA ltM l0);
[ intros Op1 | apply canonical_imp_canonical with (a := a0) ];
auto.
cut (canonical A0 eqA ltM l);
[ intros Op2 | apply canonical_imp_canonical with (a := a) ];
auto.
cut (~ zeroP (A:=A) A0 eqA (n:=n) a);
[ intros Z0 | apply canonical_nzeroP with (ltM := ltM) (p := l); auto ].
cut (~ zeroP (A:=A) A0 eqA (n:=n) a0);
[ intros Z1 | apply canonical_nzeroP with (ltM := ltM) (p := l0) ];
auto.
Qed.
Hint Resolve spolyf_canonical.
intros a; case a; simpl in |- *; unfold LetP in |- *; auto.
intros; apply minuspf_refl with (1 := cs); auto.
Qed.
intros a b; case a; case b; simpl in |- *; auto.
intros a0 l a1 l0 Cpxa0 Cpxa1.
cut (~ zeroP (A:=A) A0 eqA (n:=n) a0);
[ intros nZa0 | apply canonical_nzeroP with (ltM := ltM) (p := l); auto ].
cut (~ zeroP (A:=A) A0 eqA (n:=n) a1);
[ intros nZa1 | apply canonical_nzeroP with (ltM := ltM) (p := l0); auto ].
change
(eqP A eqA n
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l))
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a0 a1) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a0 a1) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0))))
in |- *.
cut (canonical A0 eqA ltM l);
[ intros Op1 | apply canonical_imp_canonical with (a := a0); auto ].
cut (canonical A0 eqA ltM l0);
[ intros Op2 | apply canonical_imp_canonical with (a := a1); auto ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0)
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l)));
[ auto | idtac ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) (T1 A1 n)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0))
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); apply eqp_pluspf_com with (1 := cs);
auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0))
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l)));
[ apply eqp_pluspf_com with (1 := cs); auto | idtac ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n)
(multTerm (A:=A) multA (n:=n) (T1 A1 n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0))
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l)));
[ apply eqp_pluspf_com with (1 := cs); auto | idtac ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(multTerm (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(invTerm (A:=A) invA (n:=n) (T1 A1 n)))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0))
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l)));
[ apply eqp_pluspf_com with (1 := cs); auto;
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto
| idtac ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0)))
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l)));
[ apply eqp_pluspf_com with (1 := cs); auto | idtac ].
apply canonical_mults with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply mults_dist_pluspf with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l)
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a1 a0) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0)))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply mults_comp with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a0 a1) (b:=a0)
(canonical_nzeroP A A0 eqA n ltM a0 l Cpxa1)) l)
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a0 a1) (b:=a1)
(canonical_nzeroP A A0 eqA n ltM a1 l0 Cpxa0)) l0)));
auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
Qed.
intros a b nZa nZb p q Cpxa Cpxb; simpl in |- *; auto.
cut (canonical A0 eqA ltM p); [ intros Op1 | auto ]; auto.
cut (canonical A0 eqA ltM q); [ intros Op2 | auto ]; unfold LetP in |- *;
simpl in |- *; auto.
apply canonical_imp_canonical with (a := b); auto.
apply canonical_imp_canonical with (a := a); auto.
Qed.
Hint Resolve spolyf_def.
intros a b c nZa nZb nZppab H' H'0 p q r Cpxa Cpxb H'4.
cut (canonical A0 eqA ltM p);
[ intros Op | apply canonical_imp_canonical with (a := a); auto ].
cut (canonical A0 eqA ltM q);
[ intros Oq | apply canonical_imp_canonical with (a := b); auto ].
cut (divP A A0 eqA multA divA n (ppc (A:=A) A1 (n:=n) a b) a);
[ intros div1 | apply divP_ppcl with (1 := cs); auto ].
cut (divP A A0 eqA multA divA n (ppc (A:=A) A1 (n:=n) a b) b);
[ intros div2 | apply divP_ppcr with (1 := cs); auto ].
cut (divP A A0 eqA multA divA n c (ppc (A:=A) A1 (n:=n) a b));
[ intros div3 | elim ppc_is_ppcm with (1 := cs); auto ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa) p)
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) q)))).
apply mults_comp with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa) p)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) q));
auto.
cut (~ zeroP (A:=A) A0 eqA (n:=n) c);
[ intros Z2 | inversion_clear H'0; auto ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa) p))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) q))));
[ auto | idtac ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(multTerm (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa)) p)
(mults (A:=A) multA (n:=n)
(multTerm (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) q))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a) nZa)
p)
(mults (A:=A) multA (n:=n)
(multTerm (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) q)));
[ auto | idtac ].
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply mults_comp with (1 := cs); auto.
apply divTerm_compo with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a) nZa)
p)
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) q)))).
apply eqp_pluspf_com with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a) nZa)
p)
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(multTerm (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb)) q))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); apply eqp_pluspf_com with (1 := cs);
auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a) nZa)
p)
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))).
apply eqp_pluspf_com with (1 := cs); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply mults_comp with (1 := cs); auto.
apply mults_comp with (1 := cs); auto.
apply divTerm_compo with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a) nZa)
p)); [ auto | idtac ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec (pO A n)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
r)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p))).
apply eqp_pluspf_com with (1 := cs); auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); apply minuspf_refl with (1 := cs);
auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec r
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p))).
apply eqp_pluspf_com with (1 := cs); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec r
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p)))).
apply eqp_pluspf_com with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q)) r)
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec r
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q)))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p))).
apply eqp_pluspf_com with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p))).
apply eqp_pluspf_com with (1 := cs); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r)
(mults (A:=A) multA (n:=n) (T1 A1 n)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p)))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r)
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p)))).
apply eqp_pluspf_com with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r)
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n)
(multTerm (A:=A) multA (n:=n)
(T1 A1 n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p)))); auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply canonical_pluspf; auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r)
(mults (A:=A) multA (n:=n)
(multTerm (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(invTerm (A:=A) invA (n:=n) (T1 A1 n)))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p)))).
apply eqp_pluspf_com with (1 := cs); auto.
apply canonical_pluspf; auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n)) r)
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=a) nZa) p))))).
apply eqp_pluspf_com with (1 := cs); auto.
apply canonical_pluspf; auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec r
(mults (A:=A) multA (n:=n)
(invTerm (A:=A) invA (n:=n) (T1 A1 n))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=a) nZa) p))))).
apply eqp_pluspf_com with (1 := cs); auto.
apply canonical_pluspf; auto.
apply canonical_mults with (1 := cs); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(mults (A:=A) multA (n:=n) (invTerm (A:=A) invA (n:=n) (T1 A1 n))
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p)))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply eqp_pluspf_com with (1 := cs); auto.
apply canonical_mults with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=b)
nZb) q))
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec r
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c (b:=a)
nZa) p))); auto; apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n);
auto.
Qed.
intros a b nZa nZb p q r Cpxa Cpxb H'1.
cut (~ zeroP (A:=A) A0 eqA (n:=n) (ppc (A:=A) A1 (n:=n) a b));
[ intros nZppab | auto ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := mults (A:=A) multA (n:=n) (T1 A1 n)
(spolyf (pX a p) (pX b q) Cpxa Cpxb)).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=ppc (A:=A) A1 (n:=n) a b)
nZppab) (spolyf (pX a p) (pX b q) Cpxa Cpxb)).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply eqTerm_spolyf_red2; auto.
Qed.
simpl in |- *; unfold LetP in |- *; simpl in |- *.
intros a b nZa nZb p q Cpxa Cpxb.
cut (canonical A0 eqA ltM p);
[ intros Op | apply canonical_imp_canonical with (a := a); auto ].
cut (canonical A0 eqA ltM q);
[ intros Oq | apply canonical_imp_canonical with (a := b); auto ].
cut (~ zeroP (A:=A) A0 eqA (n:=n) (ppc (A:=A) A1 (n:=n) a b));
[ intros nZppab | auto ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa) p)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) q));
auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(pX (ppc (A:=A) A1 (n:=n) a b)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa) p))
(pX (ppc (A:=A) A1 (n:=n) a b)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) q))).
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n).
apply minuspf_zero with (1 := cs); auto.
cut
(eqTerm (A:=A) eqA (n:=n) (ppc (A:=A) A1 (n:=n) a b)
(multTerm (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa) a));
[ intros Z2 | auto ].
cut
(eqTerm (A:=A) eqA (n:=n) (ppc (A:=A) A1 (n:=n) a b)
(multTerm (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) b));
[ intros Z3 | auto ].
apply minuspf_comp with (1 := cs); auto.
apply
canonical_pX_eqT
with
(a := multTerm (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa) a);
auto.
change
(canonical A0 eqA ltM
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa) (pX a p)))
in |- *; auto.
apply (eqT_sym A n); apply (eqTerm_imp_eqT A eqA n); auto.
apply
canonical_pX_eqT
with
(a := multTerm (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) b);
auto.
change
(canonical A0 eqA ltM
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) (pX b q)))
in |- *; auto.
apply (eqT_sym A n); apply (eqTerm_imp_eqT A eqA n); auto.
change
(canonical A0 eqA ltM
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa) (pX a p)))
in |- *; auto.
change
(canonical A0 eqA ltM
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb) (pX b q)))
in |- *; auto.
Qed.
intros a b c nZa nZb nZppab H' H'0 p q Cpxa Cpxb.
cut (canonical A0 eqA ltM p);
[ intros Op | apply canonical_imp_canonical with (a := a) ];
auto.
cut (canonical A0 eqA ltM q);
[ intros Oq | apply canonical_imp_canonical with (a := b) ];
auto.
cut (~ zeroP (A:=A) A0 eqA (n:=n) c); [ intros Z2 | idtac ].
cut (divP A A0 eqA multA divA n c (ppc (A:=A) A1 (n:=n) a b));
[ intros div1 | idtac ].
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa)
(pX a p))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb)
(pX b q)))).
apply mults_comp with (1 := cs); auto.
apply spoly_is_minus; auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa)
(pX a p)))
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb)
(pX b q)))).
apply mults_dist_minuspf with (1 := cs); auto.
apply
(eqp_trans _ _ _ _ _ _ _ _ _ cs n)
with
(y := minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(mults (A:=A) multA (n:=n)
(multTerm (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=a) nZa))
(pX a p))
(mults (A:=A) multA (n:=n)
(multTerm (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) c
(b:=ppc (A:=A) A1 (n:=n) a b) nZppab)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n)
(ppc (A:=A) A1 (n:=n) a b) (b:=b) nZb))
(pX b q))).
apply minuspf_comp with (1 := cs); auto;
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply minuspf_comp with (1 := cs); auto.
apply mults_comp with (1 := cs); auto.
apply (eqTerm_sym _ _ _ _ _ _ _ _ _ cs n); apply divTerm_compo with (1 := cs);
auto.
apply mults_comp with (1 := cs); auto.
apply (eqTerm_sym _ _ _ _ _ _ _ _ _ cs n); apply divTerm_compo with (1 := cs);
auto.
case ppc_is_ppcm with (1 := cs) (a := a) (b := b); auto.
apply (divP_inv1 _ A0 eqA multA divA n) with (b := a); auto.
Qed.
Inductive ReduStarConfluent (Q : list (poly A0 eqA ltM))
(p : list (Term A n)) : Prop :=
ReduStarConfluent0 :
(forall r s : list (Term A n),
reducestar A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
p r ->
reducestar A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
p s -> eqP A eqA n r s) -> ReduStarConfluent Q p.
intros Q a p Op1 H'0 r s H'1 H'2 r1 s1 H'3 H'4.
cut (canonical A0 eqA ltM p);
[ intros Op2 | apply canonical_imp_canonical with (a := a); auto ].
cut (canonical A0 eqA ltM (pX a r));
[ intros Op3 | apply canonical_reduce with (1 := cs) (3 := H'1); auto ].
cut (canonical A0 eqA ltM r);
[ intros Op4 | apply canonical_imp_canonical with (a := a); auto ].
cut (canonical A0 eqA ltM (pX a s));
[ intros Op5 | apply canonical_reduce with (1 := cs) (3 := H'2); auto ].
cut (canonical A0 eqA ltM s);
[ intros Op6 | apply canonical_imp_canonical with (a := a); auto ].
lapply (H'0 p);
[ intros H'5; lapply H'5;
[ intros H'6; elim H'6; clear H'5 | apply ltP_refl_pX with (1 := cs) ]
| idtac ]; auto.
intros H'5.
elim
reduce0_reducestar
with (1 := cs) (eqA_dec := eqA_dec) (ltM_dec := ltM_dec) (Q := Q) (p := s);
auto; intros s0 E.
elim
reduce0_reducestar
with (1 := cs) (eqA_dec := eqA_dec) (ltM_dec := ltM_dec) (Q := Q) (p := r);
auto; intros r0 E0.
cut
(reduceplus A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(pX a r) (pX a r0));
[ intros red1 | apply reduceplus_skip with (1 := cs); auto; elim E0 ];
auto.
cut (canonical A0 eqA ltM (pX a r0));
[ intros Op7 | apply canonical_reduceplus with (1 := cs) (3 := red1) ];
auto.
cut
(reduceplus A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(pX a s) (pX a s0));
[ intros red2 | apply reduceplus_skip with (1 := cs); auto; elim E ];
auto.
cut (canonical A0 eqA ltM (pX a s0));
[ intros Op8 | apply canonical_reduceplus with (1 := cs) (3 := red2) ];
auto.
cut (eqP A eqA n (pX a r0) (pX a s0)); [ intros eqPR1 | auto ].
elim
reduce0_reducestar
with
(1 := cs)
(eqA_dec := eqA_dec)
(ltM_dec := ltM_dec)
(Q := Q)
(p := pX a r0); auto; intros t0 E1.
elim
reduce0_reducestar
with
(1 := cs)
(eqA_dec := eqA_dec)
(ltM_dec := ltM_dec)
(Q := Q)
(p := pX a s0); auto; intros t1 E2.
cut
(reducestar A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(pX a r) t0);
[ intros red3
| apply
(reducestar_trans A A0 A1 eqA plusA invA minusA multA divA cs eqA_dec n
ltM ltM_dec os Q) with (y := pX a r0) ]; auto.
cut
(reducestar A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(pX a s) t1);
[ intros red4
| apply
(reducestar_trans A A0 A1 eqA plusA invA minusA multA divA cs eqA_dec n
ltM ltM_dec os Q) with (y := pX a s0) ]; auto.
cut (eqP A eqA n t0 t1); [ intros eqPR2 | auto ].
apply (eqp_trans _ _ _ _ _ _ _ _ _ cs n) with (y := t0); auto.
lapply (H'0 (pX a r));
[ intros H'7; lapply H'7; [ intros H'8; elim H'8; clear H'7 | clear H'7 ]
| idtac ]; auto.
apply ltP_reduce with (1 := cs) (3 := H'1); auto.
apply (eqp_trans _ _ _ _ _ _ _ _ _ cs n) with (y := t1); auto.
lapply (H'0 (pX a s));
[ intros H'7; lapply H'7; [ intros H'8; elim H'8; clear H'7 | clear H'7 ]
| idtac ]; auto.
apply ltP_reduce with (1 := cs) (3 := H'2); auto.
lapply
(reducestar_eqp_com _ _ _ _ _ _ _ _ _ cs eqA_dec n ltM ltM_dec os Q
(pX a r0) t0 (pX a s0) t0);
[ intros H'11; lapply H'11;
[ intros H'12; lapply H'12;
[ intros H'13; lapply H'13;
[ intros H'14; clear H'13 H'12 H'11 | clear H'13 H'12 H'11 ]
| clear H'12 H'11 ]
| clear H'11 ]
| idtac ]; auto.
lapply (H'0 (pX a s0));
[ intros H'7; lapply H'7; [ intros H'8; elim H'8; clear H'7 | clear H'7 ]
| idtac ]; auto.
elim
order_reduceplus
with
(1 := cs)
(Q := Q)
(p := pX a s)
(q := pX a s0)
(ltM_dec := ltM_dec)
(eqA_dec := eqA_dec); auto.
intros H'13; apply ltP_trans with (y := pX a s); auto.
apply
ltP_reduce with (1 := cs) (ltM_dec := ltM_dec) (eqA_dec := eqA_dec) (Q := Q);
auto.
intros H'13;
apply (ltp_eqp_comp A A0 eqA) with (ltM := ltM) (p := pX a s) (q := pX a p);
auto.
apply
ltP_reduce with (Q := Q) (1 := cs) (ltM_dec := ltM_dec) (eqA_dec := eqA_dec);
auto.
apply eqpP1; auto.
apply H'5; auto.
inversion_clear E0; auto.
apply reducestar0; auto.
apply Rstar_n with (y := r); auto.
apply reduce_inv with (1 := cs) (3 := H'1); auto.
apply reducestar0; auto.
apply Rstar_n with (y := s); auto.
apply reduce_inv with (1 := cs) (3 := H'2); auto.
inversion_clear E; auto.
inversion_clear E; auto.
Qed.
Inductive Spoly_1 (Q : list (poly A0 eqA ltM)) :
list (Term A n) -> list (Term A n) -> Prop :=
| Spoly_10 :
forall (p q : list (Term A n)) (Cp : canonical A0 eqA ltM p)
(Cq : canonical A0 eqA ltM q),
reducestar A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(spolyf p q Cp Cq) (pO A n) -> Spoly_1 Q p q
| Spoly_11 :
forall (b c d : Term A n) (q r r0 s0 t : list (Term A n)),
Spoly_1 Q (pX c r) (pX d t) ->
Spoly_1 Q (pX d t) (pX b q) ->
inPolySet A A0 eqA n ltM (pX d t) Q ->
divP A A0 eqA multA divA n (ppc (A:=A) A1 (n:=n) c b) d ->
Spoly_1 Q (pX c r) (pX b q).
Inductive SpolyQ (Q : list (poly A0 eqA ltM)) : Prop :=
SpolyQ0 :
(forall p q : list (Term A n),
inPolySet A A0 eqA n ltM p Q ->
canonical A0 eqA ltM p ->
inPolySet A A0 eqA n ltM q Q ->
canonical A0 eqA ltM q -> Spoly_1 Q p q) ->
SpolyQ Q.
Inductive Reducep (Q : list (poly A0 eqA ltM)) :
list (Term A n) -> list (Term A n) -> list (Term A n) -> Prop :=
Reducep0 :
forall (a b c : Term A n) (nZb : ~ zeroP (A:=A) A0 eqA (n:=n) b)
(nZc : ~ zeroP (A:=A) A0 eqA (n:=n) c) (p q r : list (Term A n)),
reduce A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(pX a p)
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a
b nZb p q) ->
reduce A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(pX a p)
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a
c nZc p r) ->
divP A A0 eqA multA divA n a b ->
inPolySet A A0 eqA n ltM (pX b q) Q ->
divP A A0 eqA multA divA n a c ->
inPolySet A A0 eqA n ltM (pX c r) Q ->
Reducep Q (pX a p) (pX b q) (pX c r).
Inductive Confluent (Q : list (poly A0 eqA ltM)) :
list (Term A n) -> list (Term A n) -> list (Term A n) -> Prop :=
Confluent0 :
forall (a b c : Term A n) (nZb : ~ zeroP (A:=A) A0 eqA (n:=n) b)
(nZc : ~ zeroP (A:=A) A0 eqA (n:=n) c) (p q r : list (Term A n)),
(forall r1 s1 : list (Term A n),
reducestar A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a
b nZb p q) r1 ->
reducestar A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a
c nZc p r) s1 -> eqP A eqA n r1 s1) ->
Confluent Q (pX a p) (pX b q) (pX c r).
intros Q a b c nZb nZc p q r r1 s1 H'0 H'1 H'2; inversion_clear H'0.
apply H.
rewrite sp_rew with (1 := cs) (a := a) (b := b) (nZ2 := nZb); auto.
rewrite sp_rew with (1 := cs) (a := a) (b := c) (nZ2 := nZc); auto.
Qed.
intros Q a b c d p q r t H' H'0 H'1 H'2 H'3 H'4.
cut (~ zeroP (A:=A) A0 eqA (n:=n) b); [ intros nZb | idtac ].
cut (~ zeroP (A:=A) A0 eqA (n:=n) c); [ intros nZc | idtac ].
cut (~ zeroP (A:=A) A0 eqA (n:=n) d); [ intros nZd | idtac ].
apply Confluent0 with (nZb := nZc) (nZc := nZb); auto.
intros r1 s1 H'5 H'6.
elim
reduce0_reducestar
with
(eqA_dec := eqA_dec)
(ltM_dec := ltM_dec)
(1 := cs)
(Q := Q)
(p := spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a
d nZd p t); auto.
intros t0 E; apply (eqp_trans _ _ _ _ _ _ _ _ _ cs n) with (y := t0).
apply
Conf_inv1
with
(Q := Q)
(a := a)
(b := c)
(c := d)
(nZb := nZc)
(nZc := nZd)
(p := p)
(q := r)
(r := t); auto.
apply
Conf_inv1
with
(Q := Q)
(a := a)
(b := d)
(c := b)
(nZb := nZd)
(nZc := nZb)
(p := p)
(q := t)
(r := q); auto.
apply canonical_spminusf with (1 := cs); auto.
apply canonical_imp_canonical with (a := a); auto.
apply canonical_imp_canonical with (a := d); auto.
inversion_clear H'; auto.
apply canonical_nzeroP with (ltM := ltM) (p := t); auto.
apply canonical_nzeroP with (ltM := ltM) (p := r); auto.
apply inPolySet_imp_canonical with (L := Q); auto.
inversion_clear H'; auto.
apply canonical_nzeroP with (ltM := ltM) (p := q); auto.
apply inPolySet_imp_canonical with (L := Q); auto.
inversion_clear H'0; auto.
Qed.
intros Q a b c nZb nZc p q r Cpxc Cpxb red_r0 Cpxa divP_ab in_bp_Q divP_ac
in_cr_Q Rec red1 red2 r1 s1 reds1 reds2.
cut (canonical A0 eqA ltM p);
[ intros Op1 | apply canonical_imp_canonical with a; auto ].
cut (canonical A0 eqA ltM r);
[ intros Op2 | apply canonical_imp_canonical with c; auto ].
cut (canonical A0 eqA ltM q);
[ intros Op3 | apply canonical_imp_canonical with b; auto ].
cut (~ zeroP (A:=A) A0 eqA (n:=n) a); [ intros nZa | idtac ].
cut (~ zeroP (A:=A) A0 eqA (n:=n) (ppc (A:=A) A1 (n:=n) c b));
[ intros nZppcd | idtac ].
cut
(eqP A eqA n
(mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) a
(b:=ppc (A:=A) A1 (n:=n) c b) nZppcd)
(spolyf (pX c r) (pX b q) Cpxc Cpxb))
(minuspf A A0 A1 eqA invA minusA multA eqA_dec n ltM ltM_dec
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a b
nZb p q)
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a c
nZc p r))); [ intros red3 | apply eqTerm_spolyf_red2; auto ].
2: apply ppc_nZ with (1 := cs); auto.
2: apply canonical_nzeroP with (ltM := ltM) (p := p); auto.
inversion_clear red_r0.
lapply
(reduceplus_mults _ _ _ _ _ _ _ _ _ cs eqA_dec n ltM ltM_dec os Q
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) a
(b:=ppc (A:=A) A1 (n:=n) c b) nZppcd)
(spolyf (pX c r) (pX b q) Cpxc Cpxb) (pO A n));
[ intros H'3; lapply H'3;
[ intros H'4; lapply H'4; [ intros H'5; clear H'4 H'3 | clear H'4 H'3 ]
| clear H'3 ]
| idtac ]; auto.
elim
(red_minus_zero_reduce _ _ _ _ _ _ _ _ _ cs eqA_dec _ _ ltM_dec os Q
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a b
nZb p q)
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a c
nZc p r));
[ intros r2 E; elim E; intros H'6 H'7; clear E | idtac | idtac | idtac ];
auto.
2: apply canonical_spminusf with (1 := cs); auto.
2: apply canonical_spminusf with (1 := cs); auto.
elim
reduce0_reducestar
with (1 := cs) (Q := Q) (p := r2) (ltM_dec := ltM_dec) (eqA_dec := eqA_dec);
auto.
intros t0 E;
lapply
(Rec
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a b
nZb p q));
[ intros H'1; lapply H'1; [ intros H'2; elim H'2; clear H'1 | clear H'1 ]
| idtac ]; auto.
intros H'.
lapply
(Rec
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a c
nZc p r));
[ intros H'1; lapply H'1; [ intros H'3; elim H'3; clear H'1 | clear H'1 ]
| idtac ]; auto.
intros H'1.
apply (eqp_trans _ _ _ _ _ _ _ _ _ cs n) with (y := t0).
apply H'; auto.
auto;
apply
(reducestar_trans A A0 A1 eqA plusA invA minusA multA divA cs eqA_dec n ltM
ltM_dec os Q) with (y := r2); auto.
apply canonical_spminusf with (1 := cs); auto.
apply H'1; auto.
apply
(reducestar_trans A A0 A1 eqA plusA invA minusA multA divA cs eqA_dec n ltM
ltM_dec os Q) with (y := r2); auto.
apply canonical_spminusf with (1 := cs); auto.
apply
ltP_reduce with (Q := Q) (1 := cs) (ltM_dec := ltM_dec) (eqA_dec := eqA_dec);
auto.
apply canonical_spminusf with (1 := cs); auto.
apply
ltP_reduce with (Q := Q) (1 := cs) (ltM_dec := ltM_dec) (eqA_dec := eqA_dec);
auto.
apply canonical_spminusf with (1 := cs); auto.
apply canonical_reduceplus with (1 := cs) (3 := H'7); auto.
apply canonical_spminusf with (1 := cs); auto.
apply
reduceplus_eqp_com
with
(p := mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) a
(b:=ppc (A:=A) A1 (n:=n) c b) nZppcd)
(spolyf (pX c r) (pX b q) Cpxc Cpxb))
(q := mults (A:=A) multA (n:=n)
(divTerm (A:=A) (A0:=A0) (eqA:=eqA) divA (n:=n) a
(b:=ppc (A:=A) A1 (n:=n) c b) nZppcd)
(pO A n))
(1 := cs); auto; simpl in |- *; auto.
Qed.
intros Q q r Spoly1; elim Spoly1; clear Spoly1 q r.
intros q r Cq Cr red0 p H'1;
(generalize Cq Cr red0; inversion_clear H'1; clear red0 Cq Cr).
intros Cq Cr H' H'0 H'1 H'2 H'3.
apply Confluent0 with (nZb := nZb) (nZc := nZc); auto.
intros r1 s1 H'5 H'6.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n).
apply (confl_top_simpl Q a c b nZc nZb p0 r0 q0 Cq Cr); auto.
intros b c d q r H' H'0 t H'1 H'2 H'3 H'4 H'5 H'6 p H'7 H'8 H'9 H'10 H'11.
generalize H'11 H'8; clear H'11 H'8; inversion_clear H'7.
intros H'8 H'11.
cut (divP A A0 eqA multA divA n a d); [ intros div0 | idtac ].
2: apply
(divP_trans _ _ _ _ _ _ _ _ _ cs n) with (y := ppc (A:=A) A1 (n:=n) c b);
auto.
2: case ppc_is_ppcm with (1 := cs) (a := c) (b := b); auto.
cut (~ zeroP (A:=A) A0 eqA (n:=n) d); [ intros nZd | inversion div0 ]; auto.
cut (Reducep Q (pX a p0) (pX d t) (pX b q)); [ intros Red0 | idtac ].
2: apply Reducep0 with (nZb := nZd) (nZc := nZc); auto.
cut (Reducep Q (pX a p0) (pX c r) (pX d t)); [ intros Red1 | idtac ].
2: apply Reducep0 with (nZb := nZb) (nZc := nZd); auto.
apply Conf_trans with (d := d) (t := t); auto.
apply H'2; auto.
apply inPolySet_imp_canonical with (L := Q); auto.
apply H'4; auto.
apply inPolySet_imp_canonical with (L := Q); auto.
apply inPolySet_imp_canonical with (L := Q); auto.
apply reducetop_sp with (1 := cs); auto.
apply reducetop_sp with (1 := cs); auto.
Qed.

Theorem confl_top :
forall Q : list (poly A0 eqA ltM),
SpolyQ Q ->
forall (a b c : Term A n) (nZb : ~ zeroP (A:=A) A0 eqA (n:=n) b)
(nZc : ~ zeroP (A:=A) A0 eqA (n:=n) c) (p q r : list (Term A n)),
canonical A0 eqA ltM (pX a p) ->
divP A A0 eqA multA divA n a b ->
inPolySet A A0 eqA n ltM (pX b q) Q ->
divP A A0 eqA multA divA n a c ->
inPolySet A A0 eqA n ltM (pX c r) Q ->
(forall q : list (Term A n),
canonical A0 eqA ltM q ->
ltP (A:=A) (n:=n) ltM q (pX a p) -> ReduStarConfluent Q q) ->
reduce A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(pX a p)
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a b nZb
p q) ->
reduce A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(pX a p)
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a c nZc
p r) ->
forall r1 s1 : list (Term A n),
reducestar A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a b nZb
p q) r1 ->
reducestar A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q
(spminusf A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec a c nZc
p r) s1 -> eqP A eqA n r1 s1.