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| Mirrors > Home > ILE Home > Th. List > 2fveq3 | Unicode version | ||
| Description: Equality theorem for nested function values. (Contributed by AV, 14-Aug-2022.) |
| Ref | Expression |
|---|---|
| 2fveq3 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq2 5695 |
. 2
| |
| 2 | 1 | fveq2d 5699 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| 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 4131 df-iota 5337 df-fv 5385 |
| This theorem is used by: difinfsnlem 7439 ctssdclemn0 7450 cc2 7633 seq3f1olemqsum 10963 seq3f1oleml 10966 seq3f1o 10967 seq3homo 10977 seqhomog 10980 hashf1 11301 seq3coll 11308 fsumf1o 12173 iserabs 12258 explecnv 12288 cvgratnnlemnexp 12307 cvgratnnlemmn 12308 fprodf1o 12371 nninfctlemfo 12833 alginv 12841 algcvg 12842 algcvga 12845 ctiunctlemu1st 13374 ctiunctlemu2nd 13375 ctiunctlemudc 13377 ctiunctlemfo 13379 prdsbasprj 14231 prdsplusgfval 14233 prdsmulrfval 14235 prdsbas3 14236 prdsinvlem 14245 isunitd 14462 logfac 16048 wkslem1 16659 wkslem2 16660 2wlklem 16715 eupthseg 16791 eupth2lem3fi 16815 subctctexmid 17128 |
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