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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 5965 | . 2 ⊢ dom (𝐴 ↾ V) = (V ∩ dom 𝐴) | |
| 2 | incom 4139 | . 2 ⊢ (V ∩ dom 𝐴) = (dom 𝐴 ∩ V) | |
| 3 | inv1 4327 | . 2 ⊢ (dom 𝐴 ∩ V) = dom 𝐴 | |
| 4 | 1, 2, 3 | 3eqtri 2766 | 1 ⊢ dom (𝐴 ↾ V) = dom 𝐴 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1547 Vcvv 3431 ∩ cin 3882 dom cdm 5619 ↾ cres 5621 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-sep 5219 ax-pr 5363 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4263 df-if 4456 df-sn 4557 df-pr 4559 df-op 4563 df-br 5074 df-opab 5136 df-xp 5625 df-dm 5629 df-res 5631 |
| This theorem is referenced by: fidomdm 9235 dmttrcl 9634 dmct 10438 dfsucmap3 38839 |
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