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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 5491 | . 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 1398 ⟶wf 5347 |
| 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 1496 ax-gen 1498 ax-4 1559 ax-17 1575 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-cleq 2225 df-fn 5354 df-f 5355 |
| This theorem is referenced by: feq12d 5497 ffdm 5532 fsng 5849 fsn2g 5851 issmo2 6519 qliftf 6853 elpm2r 6899 casef 7378 fseq1p1m1 10424 fseq1m1p1 10425 seqf 10822 seqf2 10826 seqf1og 10879 iswrdinn0 11222 wrdf 11223 iswrdiz 11224 wrdffz 11238 ffz0iswrdnn0 11244 wrdnval 11248 ccatalpha 11294 swrdf 11340 swrdwrdsymbg 11349 cats1un 11406 s2dmg 11475 intopsn 13569 gsumprval 13601 resmhm 13689 gsumwsubmcl 13698 gsumwmhm 13700 isghm 13949 resghm 13966 gsumsplit0 14052 psrelbasfi 14818 lmtopcnp 15102 ellimc3apf 15512 dvidlemap 15543 dvidrelem 15544 dvidsslem 15545 dviaddf 15557 dvimulf 15558 dvcjbr 15560 dvcj 15561 dvrecap 15565 dvmptclx 15570 uhgrm 16060 wrdupgren 16078 upgrfnen 16080 wrdumgren 16088 umgrfnen 16090 upgr2wlkdc 16359 wlkres 16361 gfsumval 16848 gsumgfsum 16852 |
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