Corollary paco0_2_0_mult: forall r_0 r_1,
  paco0_2_0 gf_0 gf_1 (paco0_2_0 gf_0 gf_1 r_0 r_1) (paco0_2_1 gf_0 gf_1 r_0 r_1) <0= paco0_2_0 gf_0 gf_1 r_0 r_1.Corollary paco0_2_1_mult: forall r_0 r_1,
  paco0_2_1 gf_0 gf_1 (paco0_2_0 gf_0 gf_1 r_0 r_1) (paco0_2_1 gf_0 gf_1 r_0 r_1) <0= paco0_2_1 gf_0 gf_1 r_0 r_1.

Theorem paco0_2_0_fold: forall r_0 r_1, gf_0 (upaco0_2_0 gf_0 gf_1 r_0 r_1) (upaco0_2_1 gf_0 gf_1 r_0 r_1) <0= paco0_2_0 gf_0 gf_1 r_0 r_1.