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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 5466 | . 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 1397 ⟶wf 5322 |
| 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 1495 ax-gen 1497 ax-4 1558 ax-17 1574 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 df-fn 5329 df-f 5330 |
| This theorem is referenced by: feq12d 5472 ffdm 5505 fsng 5820 fsn2g 5822 issmo2 6455 qliftf 6789 elpm2r 6835 casef 7287 fseq1p1m1 10329 fseq1m1p1 10330 seqf 10727 seqf2 10731 seqf1og 10784 iswrdinn0 11119 wrdf 11120 iswrdiz 11121 wrdffz 11135 ffz0iswrdnn0 11141 wrdnval 11145 ccatalpha 11191 swrdf 11237 swrdwrdsymbg 11246 cats1un 11303 s2dmg 11372 intopsn 13452 gsumprval 13484 resmhm 13572 gsumwsubmcl 13581 gsumwmhm 13583 isghm 13832 resghm 13849 gsumsplit0 13935 psrelbasfi 14693 lmtopcnp 14977 ellimc3apf 15387 dvidlemap 15418 dvidrelem 15419 dvidsslem 15420 dviaddf 15432 dvimulf 15433 dvcjbr 15435 dvcj 15436 dvrecap 15440 dvmptclx 15445 uhgrm 15932 wrdupgren 15950 upgrfnen 15952 wrdumgren 15960 umgrfnen 15962 upgr2wlkdc 16231 wlkres 16233 gfsumval 16701 gsumgfsum 16705 |
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