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Mirrors > Home > ILE Home > Th. List > foeq123d | Unicode version |
Description: Equality deduction for onto functions. (Contributed by Mario Carneiro, 27-Jan-2017.) |
Ref | Expression |
---|---|
f1eq123d.1 | |
f1eq123d.2 | |
f1eq123d.3 |
Ref | Expression |
---|---|
foeq123d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1eq123d.1 | . . 3 | |
2 | foeq1 5122 | . . 3 | |
3 | 1, 2 | syl 14 | . 2 |
4 | f1eq123d.2 | . . 3 | |
5 | foeq2 5123 | . . 3 | |
6 | 4, 5 | syl 14 | . 2 |
7 | f1eq123d.3 | . . 3 | |
8 | foeq3 5124 | . . 3 | |
9 | 7, 8 | syl 14 | . 2 |
10 | 3, 6, 9 | 3bitrd 212 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 103 wceq 1284 wfo 4920 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-sn 3404 df-pr 3405 df-op 3407 df-br 3786 df-opab 3840 df-rel 4370 df-cnv 4371 df-co 4372 df-dm 4373 df-rn 4374 df-fun 4924 df-fn 4925 df-fo 4928 |
This theorem is referenced by: (None) |
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