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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 5700 | . 2 ⊢ (𝜑 → (𝐹‘𝐴) = (𝐺‘𝐴)) |
| 3 | fveq12d.2 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | fveq2d 5702 | . 2 ⊢ (𝜑 → (𝐺‘𝐴) = (𝐺‘𝐵)) |
| 5 | 2, 4 | eqtrd 2271 | 1 ⊢ (𝜑 → (𝐹‘𝐴) = (𝐺‘𝐵)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ‘cfv 5380 |
| 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-rex 2534 df-v 2823 df-un 3224 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4132 df-iota 5340 df-fv 5388 |
| This theorem is used by: nffvd 5710 fvsng 5914 fvmpopr2d 6228 tfrlem3ag 6585 tfrlem3a 6586 tfrlemi1 6608 tfr1onlem3ag 6613 omp1eomlem 7441 lswwrd 11373 swrdval 11442 cats1fvnd 11559 seq3shft 11625 climshft2 12097 fsum3 12179 ctiunctlemfo 13388 imasival 13686 gzsumfzval 13770 gzsumval2 13773 mulgfvalg 13983 mulgval 13984 mulgnndir 14013 mulgpropdg 14026 cntrval 14151 prdsinvlem 14303 unitinvinv 14540 rlmvalg 14900 rsp0 14939 znval 15080 reldvg 15938 dvfvalap 15940 lgsval 16361 lgsneg 16381 wlkres 16858 depindlem1 16985 depindlem2 16986 depindlem3 16987 |
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