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| Mirrors > Home > ILE Home > Th. List > 2fveq3 | GIF version | ||
| Description: Equality theorem for nested function values. (Contributed by AV, 14-Aug-2022.) |
| Ref | Expression |
|---|---|
| 2fveq3 | ⊢ (𝐴 = 𝐵 → (𝐹‘(𝐺‘𝐴)) = (𝐹‘(𝐺‘𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq2 5635 | . 2 ⊢ (𝐴 = 𝐵 → (𝐺‘𝐴) = (𝐺‘𝐵)) | |
| 2 | 1 | fveq2d 5639 | 1 ⊢ (𝐴 = 𝐵 → (𝐹‘(𝐺‘𝐴)) = (𝐹‘(𝐺‘𝐵))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ‘cfv 5324 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-rex 2514 df-v 2802 df-un 3202 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-iota 5284 df-fv 5332 |
| This theorem is referenced by: difinfsnlem 7289 ctssdclemn0 7300 cc2 7476 seq3f1olemqsum 10765 seq3f1oleml 10768 seq3f1o 10769 seq3homo 10779 seqhomog 10782 seq3coll 11096 fsumf1o 11941 iserabs 12026 explecnv 12056 cvgratnnlemnexp 12075 cvgratnnlemmn 12076 fprodf1o 12139 nninfctlemfo 12601 alginv 12609 algcvg 12610 algcvga 12613 ctiunctlemu1st 13045 ctiunctlemu2nd 13046 ctiunctlemudc 13048 ctiunctlemfo 13050 prdsbasprj 13355 prdsplusgfval 13357 prdsmulrfval 13359 prdsbas3 13360 prdsinvlem 13681 isunitd 14110 wkslem1 16117 wkslem2 16118 2wlklem 16171 eupthseg 16247 subctctexmid 16537 |
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