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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 5494 | . 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 5350 |
| 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 5357 df-f 5358 |
| This theorem is referenced by: feq12d 5500 ffdm 5535 fsng 5852 fsn2g 5854 issmo2 6522 qliftf 6856 elpm2r 6902 casef 7381 fseq1p1m1 10435 fseq1m1p1 10436 seqf 10833 seqf2 10837 seqf1og 10890 iswrdinn0 11237 wrdf 11238 iswrdiz 11239 wrdffz 11253 ffz0iswrdnn0 11259 wrdnval 11263 ccatalpha 11309 swrdf 11355 swrdwrdsymbg 11364 cats1un 11421 s2dmg 11490 intopsn 13601 gsumprval 13633 resmhm 13721 gsumwsubmcl 13730 gsumwmhm 13732 isghm 13981 resghm 13998 gsumsplit0 14084 psrelbasfi 14880 lmtopcnp 15164 ellimc3apf 15574 dvidlemap 15605 dvidrelem 15606 dvidsslem 15607 dviaddf 15619 dvimulf 15620 dvcjbr 15622 dvcj 15623 dvrecap 15627 dvmptclx 15632 uhgrm 16122 wrdupgren 16140 upgrfnen 16142 wrdumgren 16150 umgrfnen 16152 upgr2wlkdc 16421 wlkres 16423 gfsumval 16911 gsumgfsum 16915 |
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