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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 5920 |
. 2
| |
| 2 | fveq2 5648 |
. 2
| |
| 3 | 1, 2 | impbid1 142 |
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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-sbc 3033 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-f1 5338 df-fv 5341 |
| This theorem is referenced by: f1elima 5924 cocan1 5938 f1oiso 5977 2dom 7023 xpdom2 7058 en2eqpr 7142 isotilem 7265 frec2uzled 10754 seqf1oglem1 10844 hashen 11109 eulerthlemh 12883 f1ocpbllem 13473 f1ovscpbl 13475 relogef 15675 usgredg2v 16165 iswomninnlem 16782 |
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