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| Mirrors > Home > ILE Home > Th. List > f1ovi | Unicode version | ||
| Description: The identity relation is a one-to-one onto function on the universe. (Contributed by NM, 16-May-2004.) |
| Ref | Expression |
|---|---|
| f1ovi |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1oi 5587 |
. 2
| |
| 2 | reli 4828 |
. . . 4
| |
| 3 | dfrel3 5162 |
. . . 4
| |
| 4 | 2, 3 | mpbi 145 |
. . 3
|
| 5 | f1oeq1 5536 |
. . 3
| |
| 6 | 4, 5 | ax-mp 5 |
. 2
|
| 7 | 1, 6 | mpbi 145 |
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 713 ax-5 1473 ax-7 1474 ax-gen 1475 ax-ie1 1519 ax-ie2 1520 ax-8 1530 ax-10 1531 ax-11 1532 ax-i12 1533 ax-bndl 1535 ax-4 1536 ax-17 1552 ax-i9 1556 ax-ial 1560 ax-i5r 1561 ax-14 2183 ax-ext 2191 ax-sep 4181 ax-pow 4237 ax-pr 4272 |
| This theorem depends on definitions: df-bi 117 df-3an 985 df-tru 1378 df-nf 1487 df-sb 1789 df-eu 2060 df-mo 2061 df-clab 2196 df-cleq 2202 df-clel 2205 df-nfc 2341 df-ral 2493 df-rex 2494 df-v 2781 df-un 3181 df-in 3183 df-ss 3190 df-pw 3631 df-sn 3652 df-pr 3653 df-op 3655 df-br 4063 df-opab 4125 df-id 4361 df-xp 4702 df-rel 4703 df-cnv 4704 df-co 4705 df-dm 4706 df-rn 4707 df-res 4708 df-ima 4709 df-fun 5296 df-fn 5297 df-f 5298 df-f1 5299 df-fo 5300 df-f1o 5301 |
| This theorem is referenced by: residfi 7075 |
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