intros a P Q H' H'0; elim H'0; auto.
intros a0 p q s H'1 H'2 H'3 H'4 H'5.
apply
CombLinear_comp
with
(p := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) a0 q) p); auto.
apply
eqp_imp_canonical
with
(1 := cs)
(p := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) a0 q) p); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply canonical_pluspf with (1 := os); auto.
apply canonical_mults with (1 := cs); auto.
apply inPolySet_imp_canonical with (L := P); auto.
apply CombLinear_canonical with (Q := Q); auto.
apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
Qed.
Remark CombLinear_trans_cons_lem :
forall (a : list (Term A n)) (R : list (poly A0 eqA ltM)),
CombLinear R a ->
forall (b : poly A0 eqA ltM) (Q : list (poly A0 eqA ltM)),
R = b :: Q -> CombLinear Q (s2p A A0 eqA n ltM b) -> CombLinear Q a.
intros a R H'; elim H'; auto.
intros a0 p q s H'0 H'1 H'2 H'3 H'4 b Q H'5 H'6.
apply
CombLinear_comp
with
(p := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM) ltM_dec
(mults (A:=A) multA (n:=n) a0 q) p); auto.
2: apply
eqp_imp_canonical
with
(1 := cs)
(p := pluspf (A:=A) A0 (eqA:=eqA) plusA eqA_dec (n:=n) (ltM:=ltM)
ltM_dec (mults (A:=A) multA (n:=n) a0 q) p);
auto.
2: apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
2: apply canonical_pluspf; auto.
2: apply canonical_mults with (1 := cs); auto.
2: apply inPolySet_imp_canonical with (L := R); auto.
2: apply CombLinear_canonical with (1 := H'2); auto.
2: apply (eqp_sym _ _ _ _ _ _ _ _ _ cs n); auto.
apply CombLinear_pluspf; auto.
apply CombLinear_mults1; auto.
2: apply H'3 with (b := b); auto.
rewrite H'5 in H'1; inversion H'1; auto.
rewrite <- H2 in H'6; simpl in H'6; auto.
Qed.

Theorem reduce_cb :
forall (a b : list (Term A n)) (Q : list (poly A0 eqA ltM)),
reduce A A0 A1 eqA invA minusA multA divA eqA_dec n ltM ltM_dec Q a b ->
canonical A0 eqA ltM a -> CombLinear Q a -> CombLinear Q b.