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| Mirrors > Home > ILE Home > Th. List > f1eq1 | Unicode version | ||
| Description: Equality theorem for one-to-one functions. (Contributed by NM, 10-Feb-1997.) |
| Ref | Expression |
|---|---|
| f1eq1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | feq1 5511 |
. . 3
| |
| 2 | cnveq 4949 |
. . . 4
| |
| 3 | 2 | funeqd 5394 |
. . 3
|
| 4 | 1, 3 | anbi12d 477 |
. 2
|
| 5 | df-f1 5377 |
. 2
| |
| 6 | df-f1 5377 |
. 2
| |
| 7 | 4, 5, 6 | 3bitr4g 223 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from 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 theorem 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-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-sn 3711 df-pr 3712 df-op 3714 df-br 4126 df-opab 4188 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-rn 4780 df-fun 5374 df-fn 5375 df-f 5376 df-f1 5377 |
| This theorem is referenced by: f1oeq1 5622 f1eq123d 5626 fun11iun 5655 fo00 5672 tposf12 6530 f1dom4g 7029 f1dom2g 7032 f1domg 7034 dom3d 7050 domtr 7062 dom1o 7106 f1setfi 7307 djudom 7423 difinfsn 7430 djudoml 7565 djudomr 7566 hashf1lem1 11263 hashf1lem2 11264 hashf1 11265 4sqlem11 13158 nninfdc 13322 conjsubgen 14058 |
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