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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 5497 | . 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 5353 |
| 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 2216 |
| This theorem depends on definitions: df-bi 117 df-cleq 2227 df-fn 5360 df-f 5361 |
| This theorem is referenced by: feq12d 5503 ffdm 5538 fsng 5855 fsn2g 5857 issmo2 6533 qliftf 6867 elpm2r 6913 casef 7392 fseq1p1m1 10453 fseq1m1p1 10454 seqf 10853 seqf2 10857 seqf1og 10910 iswrdinn0 11257 wrdf 11258 iswrdiz 11259 wrdffz 11273 ffz0iswrdnn0 11279 wrdnval 11283 ccatalpha 11329 swrdf 11375 swrdwrdsymbg 11384 cats1un 11441 s2dmg 11510 intopsn 13633 gsumprval 13665 resmhm 13745 gsumwsubmcl 13754 gsumwmhm 13756 isghm 13999 resghm 14016 gsumsplit0 14102 gfsumval 14105 gsumgfsum 14109 psrelbasfi 14960 lmtopcnp 15244 ellimc3apf 15654 dvidlemap 15685 dvidrelem 15686 dvidsslem 15687 dviaddf 15699 dvimulf 15700 dvcjbr 15702 dvcj 15703 dvrecap 15707 dvmptclx 15712 uhgrm 16202 wrdupgren 16220 upgrfnen 16222 wrdumgren 16230 umgrfnen 16232 upgr2wlkdc 16501 wlkres 16503 |
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