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| Mirrors > Home > ILE Home > Th. List > f1fveq | Unicode version | ||
| Description: Equality of function values for a one-to-one function. (Contributed by NM, 11-Feb-1997.) |
| Ref | Expression |
|---|---|
| f1fveq |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1veqaeq 5975 |
. 2
| |
| 2 | fveq2 5695 |
. 2
| |
| 3 | 1, 2 | impbid1 142 |
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-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-sbc 3052 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fv 5385 |
| This theorem is used by: f1elima 5979 cocan1 5993 f1oiso 6032 2dom 7093 xpdom2 7129 en2eqpr 7214 isotilem 7346 frec2uzled 10866 seqf1oglem1 10956 hashen 11223 eulerthlemh 13009 f1ocpbllem 13631 f1ovscpbl 13633 relogef 15965 usgredg2v 16465 iswomninnlem 17099 |
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