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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 10970 seq3f1oleml 10973 seq3f1o 10974 seq3homo 10984 seqhomog 10987 hashf1 11308 seq3coll 11315 fsumf1o 12181 iserabs 12266 explecnv 12296 cvgratnnlemnexp 12315 cvgratnnlemmn 12316 fprodf1o 12379 nninfctlemfo 12841 alginv 12849 algcvg 12850 algcvga 12853 ctiunctlemu1st 13382 ctiunctlemu2nd 13383 ctiunctlemudc 13385 ctiunctlemfo 13387 prdsbasprj 14288 prdsplusgfval 14290 prdsmulrfval 14292 prdsbas3 14293 prdsinvlem 14302 isunitd 14521 logfac 16143 bposlem7 16334 bposlem9 16336 wkslem1 16783 wkslem2 16784 2wlklem 16839 eupthseg 16915 eupth2lem3fi 16939 subctctexmid 17252 |
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