qed.
lemma rsx_unit (h) (G): āI,L. G ā¢ ā¬*[h,#0] šā¦L.ā¤{I}ā¦.
#h #G #I #L1 @rsx_intro
#Y #HY #HnY elim HnY -HnY
elim (lpx_inv_unit_sn ā¦ HY) -HY #L2 #HL12 #H destruct
qed.
lemma rsx_unit (h) (G): āI,L. G ā¢ ā¬*[h,#0] šā¦L.ā¤{I}ā¦.
#h #G #I #L1 @rsx_intro
#Y #HY #HnY elim HnY -HnY
elim (lpx_inv_unit_sn ā¦ HY) -HY #L2 #HL12 #H destruct