(* Basic_2A1: uses: fpb_cpx *)
lemma cpx_fpbc (G) (L):
- â\88\80T1,T2. â\9dªG,Lâ\9d« â\8a¢ T1 â¬\88 T2 â\86\92 (T1 â\89\85 T2 â\86\92 â\8a¥) â\86\92 â\9dªG,L,T1â\9d« â\89» â\9dªG,L,T2â\9d«.
+ â\88\80T1,T2. â\9d¨G,Lâ\9d© â\8a¢ T1 â¬\88 T2 â\86\92 (T1 â\89\85 T2 â\86\92 â\8a¥) â\86\92 â\9d¨G,L,T1â\9d© â\89» â\9d¨G,L,T2â\9d©.
/4 width=5 by fpbc_intro, cpx_fpb, feqg_fwd_teqg/ qed.
(* Basic_2A1: uses: fpb_fqu *)
lemma fqu_fpbc (G1) (G2) (L1) (L2) (T1) (T2):
- â\9dªG1,L1,T1â\9d« â¬\82 â\9dªG2,L2,T2â\9d« â\86\92 â\9dªG1,L1,T1â\9d« â\89» â\9dªG2,L2,T2â\9d«.
+ â\9d¨G1,L1,T1â\9d© â¬\82 â\9d¨G2,L2,T2â\9d© â\86\92 â\9d¨G1,L1,T1â\9d© â\89» â\9d¨G2,L2,T2â\9d©.
/4 width=10 by fpbc_intro, fquq_fpb, fqu_fquq, fqu_fneqg/ qed.