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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 5698 | . 2 ⊢ (𝐴 = 𝐵 → (𝐺‘𝐴) = (𝐺‘𝐵)) | |
| 2 | 1 | fveq2d 5702 | 1 ⊢ (𝐴 = 𝐵 → (𝐹‘(𝐺‘𝐴)) = (𝐹‘(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: difinfsnlem 7445 ctssdclemn0 7456 cc2 7639 seq3f1olemqsum 10971 seq3f1oleml 10974 seq3f1o 10975 seq3homo 10985 seqhomog 10988 hashf1 11309 seq3coll 11316 fsumf1o 12182 iserabs 12267 explecnv 12297 cvgratnnlemnexp 12316 cvgratnnlemmn 12317 fprodf1o 12380 nninfctlemfo 12842 alginv 12850 algcvg 12851 algcvga 12854 ctiunctlemu1st 13383 ctiunctlemu2nd 13384 ctiunctlemudc 13386 ctiunctlemfo 13388 prdsbasprj 14289 prdsplusgfval 14291 prdsmulrfval 14293 prdsbas3 14294 prdsinvlem 14303 isunitd 14522 logfac 16126 bposlem7 16317 bposlem9 16319 wkslem1 16766 wkslem2 16767 2wlklem 16822 eupthseg 16898 eupth2lem3fi 16922 subctctexmid 17235 |
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