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Mirrors > Home > ILE Home > Th. List > dff12 | Unicode version |
Description: Alternate definition of a one-to-one function. (Contributed by NM, 31-Dec-1996.) |
Ref | Expression |
---|---|
dff12 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-f1 5098 | . 2 | |
2 | funcnv2 5153 | . . 3 | |
3 | 2 | anbi2i 452 | . 2 |
4 | 1, 3 | bitri 183 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 103 wb 104 wal 1314 wmo 1978 class class class wbr 3899 ccnv 4508 wfun 5087 wf 5089 wf1 5090 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 683 ax-5 1408 ax-7 1409 ax-gen 1410 ax-ie1 1454 ax-ie2 1455 ax-8 1467 ax-10 1468 ax-11 1469 ax-i12 1470 ax-bndl 1471 ax-4 1472 ax-14 1477 ax-17 1491 ax-i9 1495 ax-ial 1499 ax-i5r 1500 ax-ext 2099 ax-sep 4016 ax-pow 4068 ax-pr 4101 |
This theorem depends on definitions: df-bi 116 df-3an 949 df-tru 1319 df-nf 1422 df-sb 1721 df-eu 1980 df-mo 1981 df-clab 2104 df-cleq 2110 df-clel 2113 df-nfc 2247 df-ral 2398 df-rex 2399 df-v 2662 df-un 3045 df-in 3047 df-ss 3054 df-pw 3482 df-sn 3503 df-pr 3504 df-op 3506 df-br 3900 df-opab 3960 df-id 4185 df-xp 4515 df-rel 4516 df-cnv 4517 df-co 4518 df-fun 5095 df-f1 5098 |
This theorem is referenced by: dff13 5637 |
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