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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 5641 | . 2 ⊢ (𝜑 → (𝐹‘𝐴) = (𝐺‘𝐴)) |
| 3 | fveq12d.2 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | fveq2d 5643 | . 2 ⊢ (𝜑 → (𝐺‘𝐴) = (𝐺‘𝐵)) |
| 5 | 2, 4 | eqtrd 2264 | 1 ⊢ (𝜑 → (𝐹‘𝐴) = (𝐺‘𝐵)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 ‘cfv 5326 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-rex 2516 df-v 2804 df-un 3204 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-iota 5286 df-fv 5334 |
| This theorem is referenced by: nffvd 5651 fvsng 5850 fvmpopr2d 6158 tfrlem3ag 6475 tfrlem3a 6476 tfrlemi1 6498 tfr1onlem3ag 6503 omp1eomlem 7293 lswwrd 11164 swrdval 11233 cats1fvnd 11350 seq3shft 11403 climshft2 11871 fsum3 11953 ctiunctlemfo 13065 imasival 13394 gsumfzval 13479 gsumval2 13485 prdsinvlem 13696 mulgfvalg 13713 mulgval 13714 mulgnndir 13743 mulgpropdg 13756 unitinvinv 14144 rlmvalg 14474 rsp0 14513 znval 14656 reldvg 15409 dvfvalap 15411 lgsval 15739 lgsneg 15759 wlkres 16236 depindlem1 16351 depindlem2 16352 depindlem3 16353 |
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