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Mirrors > Home > ILE Home > Th. List > resdm | Unicode version |
Description: A relation restricted to its domain equals itself. (Contributed by NM, 12-Dec-2006.) |
Ref | Expression |
---|---|
resdm |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssid 3117 | . 2 | |
2 | relssres 4857 | . 2 | |
3 | 1, 2 | mpan2 421 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1331 wss 3071 cdm 4539 cres 4541 wrel 4544 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-br 3930 df-opab 3990 df-xp 4545 df-rel 4546 df-dm 4549 df-res 4551 |
This theorem is referenced by: resindm 4861 resdm2 5029 relresfld 5068 relcoi1 5070 funimaexg 5207 fnex 5642 dftpos2 6158 pmresg 6570 dif1en 6773 |
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