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).

Theorem Conf_inv1 :
forall (Q : list (poly A0 eqA ltM)) (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 r1 s1 : list (Term A n)),
Confluent Q (pX a p) (pX b q) (pX c r) ->
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.