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| Mirrors > Home > ILE Home > Th. List > fveq12d | GIF version | ||
| Description: Equality deduction for function value. (Contributed by FL, 22-Dec-2008.) |
| Ref | Expression |
|---|---|
| fveq12d.1 | ⊢ (𝜑 → 𝐹 = 𝐺) |
| fveq12d.2 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| fveq12d | ⊢ (𝜑 → (𝐹‘𝐴) = (𝐺‘𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq12d.1 | . . 3 ⊢ (𝜑 → 𝐹 = 𝐺) | |
| 2 | 1 | fveq1d 5695 | . 2 ⊢ (𝜑 → (𝐹‘𝐴) = (𝐺‘𝐴)) |
| 3 | fveq12d.2 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | fveq2d 5697 | . 2 ⊢ (𝜑 → (𝐺‘𝐴) = (𝐺‘𝐵)) |
| 5 | 2, 4 | eqtrd 2271 | 1 ⊢ (𝜑 → (𝐹‘𝐴) = (𝐺‘𝐵)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1402 ‘cfv 5375 |
| 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-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 theorem 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-rex 2534 df-v 2823 df-un 3224 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-br 4129 df-iota 5335 df-fv 5383 |
| This theorem is referenced by: nffvd 5705 fvsng 5905 fvmpopr2d 6219 tfrlem3ag 6574 tfrlem3a 6575 tfrlemi1 6597 tfr1onlem3ag 6602 omp1eomlem 7428 lswwrd 11334 swrdval 11403 cats1fvnd 11520 seq3shft 11586 climshft2 12055 fsum3 12137 ctiunctlemfo 13313 imasival 13610 gzsumfzval 13694 gzsumval2 13697 mulgfvalg 13907 mulgval 13908 mulgnndir 13937 mulgpropdg 13950 prdsinvlem 14179 unitinvinv 14414 rlmvalg 14774 rsp0 14813 znval 14954 reldvg 15763 dvfvalap 15765 lgsval 16106 lgsneg 16126 wlkres 16603 depindlem1 16730 depindlem2 16731 depindlem3 16732 |
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