pc1/props pc1_t
pc1/props pc1_pr0_u2
pc1/props pc1_head
+
pc3/dec pc3_dec
pc3/dec pc3_abst_dec
pc3/fsubst0 pc3_pr2_fsubst0
pc3/nf2 pc3_nf2
pc3/nf2 pc3_nf2_unfold
pc3/pc1 pc3_pc1
-pc3/props clear_pc3_trans
pc3/props pc3_pr2_r
pc3/props pc3_pr2_x
pc3/props pc3_pr3_r
pc3/props pc3_pr3_x
pc3/props pc3_pr3_t
-pc3/props pc3_refl
pc3/props pc3_s
pc3/props pc3_thin_dx
pc3/props pc3_head_1