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| Mirrors > Home > ILE Home > Th. List > feq1d | GIF version | ||
| Description: Equality deduction for functions. (Contributed by NM, 19-Feb-2008.) |
| Ref | Expression |
|---|---|
| feq1d.1 | ⊢ (𝜑 → 𝐹 = 𝐺) |
| Ref | Expression |
|---|---|
| feq1d | ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐺:𝐴⟶𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | feq1d.1 | . 2 ⊢ (𝜑 → 𝐹 = 𝐺) | |
| 2 | feq1 5516 | . 2 ⊢ (𝐹 = 𝐺 → (𝐹:𝐴⟶𝐵 ↔ 𝐺:𝐴⟶𝐵)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐹:𝐴⟶𝐵 ↔ 𝐺:𝐴⟶𝐵)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 = wceq 1402 ⟶wf 5373 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-sn 3715 df-pr 3716 df-op 3718 df-br 4131 df-opab 4193 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-fun 5379 df-fn 5380 df-f 5381 |
| This theorem is used by: feq12d 5523 fco2 5554 fssres2 5567 fresin 5568 fmpt3d 5864 fmptco 5874 fressnfv 5902 off 6315 caofinvl 6328 f2ndf 6462 eroprf 6902 pmresg 6957 pw2f1odclem 7134 fseq1p1m1 10503 mgmplusf 13688 mgmb1mgm1 13690 grpsubf 13886 lmodscaf 14649 lmbr 15316 blfps 15512 blf 15513 dvmptclx 15821 lgsfcl3 16152 |
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