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| Mirrors > Home > MPE Home > Th. List > dmresv | Structured version Visualization version GIF version | ||
| Description: The domain of a universal restriction. (Contributed by NM, 14-May-2008.) |
| Ref | Expression |
|---|---|
| dmresv | ⊢ dom (𝐴 ↾ V) = dom 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmres 6009 | . 2 ⊢ dom (𝐴 ↾ V) = (V ∩ dom 𝐴) | |
| 2 | incom 4109 | . 2 ⊢ (V ∩ dom 𝐴) = (dom 𝐴 ∩ V) | |
| 3 | inv1 4351 | . 2 ⊢ (dom 𝐴 ∩ V) = dom 𝐴 | |
| 4 | 1, 2, 3 | 3eqtri 2790 | 1 ⊢ dom (𝐴 ↾ V) = dom 𝐴 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 Vcvv 3454 ∩ cin 4092 dom cdm 5655 ↾ cres 5657 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-ext 2735 ax-sep 5252 ax-pr 5395 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2101 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-br 5107 df-opab 5171 df-xp 5661 df-dm 5665 df-res 5667 |
| This theorem is used by: fidomdm 9337 dmttrcl 9735 dmct 10615 dmctOLD 10616 dfsucmap3 39541 |
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