L1 ≛[S,T1] L2 → L1 ≛[S,T2] L2.
/3 width=5 by cpms_fwd_cpxs, cpxs_reqg_conf_sn/ qed-.
lemma cpms_reqg_conf_dx (S) (h) (n) (G) (L1) (L2):
reflexive … S → symmetric … S →
L1 ≛[S,T1] L2 → L1 ≛[S,T2] L2.
/3 width=5 by cpms_fwd_cpxs, cpxs_reqg_conf_sn/ qed-.
lemma cpms_reqg_conf_dx (S) (h) (n) (G) (L1) (L2):
reflexive … S → symmetric … S →