| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 5697 | . 2 ⊢ (𝜑 → (𝐹‘𝐴) = (𝐺‘𝐴)) |
| 3 | fveq12d.2 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | fveq2d 5699 | . 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 5377 |
| 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 4131 df-iota 5337 df-fv 5385 |
| This theorem is used by: nffvd 5707 fvsng 5911 fvmpopr2d 6225 tfrlem3ag 6580 tfrlem3a 6581 tfrlemi1 6603 tfr1onlem3ag 6608 omp1eomlem 7435 lswwrd 11366 swrdval 11435 cats1fvnd 11552 seq3shft 11618 climshft2 12090 fsum3 12172 ctiunctlemfo 13381 imasival 13678 gzsumfzval 13762 gzsumval2 13765 mulgfvalg 13975 mulgval 13976 mulgnndir 14005 mulgpropdg 14018 prdsinvlem 14247 unitinvinv 14482 rlmvalg 14842 rsp0 14881 znval 15022 reldvg 15832 dvfvalap 15834 lgsval 16245 lgsneg 16265 wlkres 16742 depindlem1 16869 depindlem2 16870 depindlem3 16871 |
| Copyright terms: Public domain | W3C validator |