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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 7440 ctssdclemn0 7451 cc2 7634 seq3f1olemqsum 10965 seq3f1oleml 10968 seq3f1o 10969 seq3homo 10979 seqhomog 10982 hashf1 11303 seq3coll 11310 fsumf1o 12176 iserabs 12261 explecnv 12291 cvgratnnlemnexp 12310 cvgratnnlemmn 12311 fprodf1o 12374 nninfctlemfo 12836 alginv 12844 algcvg 12845 algcvga 12848 ctiunctlemu1st 13377 ctiunctlemu2nd 13378 ctiunctlemudc 13380 ctiunctlemfo 13382 prdsbasprj 14266 prdsplusgfval 14268 prdsmulrfval 14270 prdsbas3 14271 prdsinvlem 14280 isunitd 14497 logfac 16090 bposlem7 16278 bposlem9 16280 wkslem1 16727 wkslem2 16728 2wlklem 16783 eupthseg 16859 eupth2lem3fi 16883 subctctexmid 17196 |
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