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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 5468 | . 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 5324 |
| 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 2212 |
| This theorem depends on definitions: df-bi 117 df-cleq 2223 df-fn 5331 df-f 5332 |
| This theorem is referenced by: feq12d 5474 ffdm 5507 fsng 5823 fsn2g 5825 issmo2 6460 qliftf 6794 elpm2r 6840 casef 7292 fseq1p1m1 10334 fseq1m1p1 10335 seqf 10732 seqf2 10736 seqf1og 10789 iswrdinn0 11127 wrdf 11128 iswrdiz 11129 wrdffz 11143 ffz0iswrdnn0 11149 wrdnval 11153 ccatalpha 11199 swrdf 11245 swrdwrdsymbg 11254 cats1un 11311 s2dmg 11380 intopsn 13473 gsumprval 13505 resmhm 13593 gsumwsubmcl 13602 gsumwmhm 13604 isghm 13853 resghm 13870 gsumsplit0 13956 psrelbasfi 14719 lmtopcnp 15003 ellimc3apf 15413 dvidlemap 15444 dvidrelem 15445 dvidsslem 15446 dviaddf 15458 dvimulf 15459 dvcjbr 15461 dvcj 15462 dvrecap 15466 dvmptclx 15471 uhgrm 15958 wrdupgren 15976 upgrfnen 15978 wrdumgren 15986 umgrfnen 15988 upgr2wlkdc 16257 wlkres 16259 gfsumval 16748 gsumgfsum 16752 |
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