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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 5639 | . 2 ⊢ (𝐴 = 𝐵 → (𝐺‘𝐴) = (𝐺‘𝐵)) | |
| 2 | 1 | fveq2d 5643 | 1 ⊢ (𝐴 = 𝐵 → (𝐹‘(𝐺‘𝐴)) = (𝐹‘(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: difinfsnlem 7298 ctssdclemn0 7309 cc2 7486 seq3f1olemqsum 10776 seq3f1oleml 10779 seq3f1o 10780 seq3homo 10790 seqhomog 10793 seq3coll 11107 fsumf1o 11956 iserabs 12041 explecnv 12071 cvgratnnlemnexp 12090 cvgratnnlemmn 12091 fprodf1o 12154 nninfctlemfo 12616 alginv 12624 algcvg 12625 algcvga 12628 ctiunctlemu1st 13060 ctiunctlemu2nd 13061 ctiunctlemudc 13063 ctiunctlemfo 13065 prdsbasprj 13370 prdsplusgfval 13372 prdsmulrfval 13374 prdsbas3 13375 prdsinvlem 13696 isunitd 14126 wkslem1 16177 wkslem2 16178 2wlklem 16233 eupthseg 16309 eupth2lem3fi 16333 subctctexmid 16627 |
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