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Mirrors > Home > MPE Home > Th. List > resdm | Structured version Visualization version GIF version |
Description: A relation restricted to its domain equals itself. (Contributed by NM, 12-Dec-2006.) |
Ref | Expression |
---|---|
resdm | ⊢ (Rel 𝐴 → (𝐴 ↾ dom 𝐴) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssid 3909 | . 2 ⊢ dom 𝐴 ⊆ dom 𝐴 | |
2 | relssres 5877 | . 2 ⊢ ((Rel 𝐴 ∧ dom 𝐴 ⊆ dom 𝐴) → (𝐴 ↾ dom 𝐴) = 𝐴) | |
3 | 1, 2 | mpan2 691 | 1 ⊢ (Rel 𝐴 → (𝐴 ↾ dom 𝐴) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1543 ⊆ wss 3853 dom cdm 5536 ↾ cres 5538 Rel wrel 5541 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pr 5307 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-br 5040 df-opab 5102 df-xp 5542 df-rel 5543 df-dm 5546 df-res 5548 |
This theorem is referenced by: resindm 5885 resdm2 6074 relresfld 6119 fimadmfoALT 6622 fnex 7011 dftpos2 7963 tfrlem11 8102 tfrlem15 8106 tfrlem16 8107 pmresg 8529 domss2 8783 axdc3lem4 10032 gruima 10381 reldisjun 30615 funresdm1 30617 bnj1321 32674 funsseq 33412 nosupbnd2lem1 33604 nosupbnd2 33605 noinfbnd2lem1 33619 noinfbnd2 33620 noetasuplem2 33623 noetasuplem3 33624 noetasuplem4 33625 noetainflem2 33627 alrmomodm 36177 relbrcoss 36250 unidmqs 36452 releldmqs 36456 releldmqscoss 36458 seff 41541 sblpnf 41542 f1cof1blem 44183 funfocofob 44185 itcoval1 45625 |
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