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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 10950 seq3f1oleml 10953 seq3f1o 10954 seq3homo 10964 seqhomog 10967 hashf1 11287 seq3coll 11294 fsumf1o 12157 iserabs 12242 explecnv 12272 cvgratnnlemnexp 12291 cvgratnnlemmn 12292 fprodf1o 12355 nninfctlemfo 12817 alginv 12825 algcvg 12826 algcvga 12829 ctiunctlemu1st 13325 ctiunctlemu2nd 13326 ctiunctlemudc 13328 ctiunctlemfo 13330 prdsbasprj 14182 prdsplusgfval 14184 prdsmulrfval 14186 prdsbas3 14187 prdsinvlem 14196 isunitd 14413 logfac 15995 wkslem1 16561 wkslem2 16562 2wlklem 16617 eupthseg 16693 eupth2lem3fi 16717 subctctexmid 17030 |
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