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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 5629 | . 2 ⊢ (𝐴 = 𝐵 → (𝐺‘𝐴) = (𝐺‘𝐵)) | |
| 2 | 1 | fveq2d 5633 | 1 ⊢ (𝐴 = 𝐵 → (𝐹‘(𝐺‘𝐴)) = (𝐹‘(𝐺‘𝐵))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ‘cfv 5318 |
| 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 2801 df-un 3201 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-iota 5278 df-fv 5326 |
| This theorem is referenced by: difinfsnlem 7277 ctssdclemn0 7288 cc2 7464 seq3f1olemqsum 10747 seq3f1oleml 10750 seq3f1o 10751 seq3homo 10761 seqhomog 10764 seq3coll 11077 fsumf1o 11916 iserabs 12001 explecnv 12031 cvgratnnlemnexp 12050 cvgratnnlemmn 12051 fprodf1o 12114 nninfctlemfo 12576 alginv 12584 algcvg 12585 algcvga 12588 ctiunctlemu1st 13020 ctiunctlemu2nd 13021 ctiunctlemudc 13023 ctiunctlemfo 13025 prdsbasprj 13330 prdsplusgfval 13332 prdsmulrfval 13334 prdsbas3 13335 prdsinvlem 13656 isunitd 14085 wkslem1 16061 wkslem2 16062 2wlklem 16115 subctctexmid 16425 |
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