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| Mirrors > Home > ILE Home > Th. List > feq2d | GIF version | ||
| Description: Equality deduction for functions. (Contributed by Paul Chapman, 22-Jun-2011.) |
| Ref | Expression |
|---|---|
| feq2d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| feq2d | ⊢ (𝜑 → (𝐹:𝐴⟶𝐶 ↔ 𝐹:𝐵⟶𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | feq2d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | feq2 5463 | . 2 ⊢ (𝐴 = 𝐵 → (𝐹:𝐴⟶𝐶 ↔ 𝐹:𝐵⟶𝐶)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐶 ↔ 𝐹:𝐵⟶𝐶)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1395 ⟶wf 5320 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1493 ax-gen 1495 ax-4 1556 ax-17 1572 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-cleq 2222 df-fn 5327 df-f 5328 |
| This theorem is referenced by: feq12d 5469 ffdm 5502 fsng 5816 issmo2 6450 qliftf 6784 elpm2r 6830 casef 7281 fseq1p1m1 10322 fseq1m1p1 10323 seqf 10719 seqf2 10723 seqf1og 10776 iswrdinn0 11111 wrdf 11112 iswrdiz 11113 wrdffz 11127 ffz0iswrdnn0 11133 wrdnval 11137 ccatalpha 11183 swrdf 11229 swrdwrdsymbg 11238 cats1un 11295 s2dmg 11364 intopsn 13443 gsumprval 13475 resmhm 13563 gsumwsubmcl 13572 gsumwmhm 13574 isghm 13823 resghm 13840 psrelbasfi 14683 lmtopcnp 14967 ellimc3apf 15377 dvidlemap 15408 dvidrelem 15409 dvidsslem 15410 dviaddf 15422 dvimulf 15423 dvcjbr 15425 dvcj 15426 dvrecap 15430 dvmptclx 15435 uhgrm 15922 wrdupgren 15940 upgrfnen 15942 wrdumgren 15950 umgrfnen 15952 upgr2wlkdc 16186 wlkres 16188 gfsumval 16630 gsumgfsum 16634 |
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