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Mirrors > Home > MPE Home > Th. List > 0rest | Structured version Visualization version GIF version |
Description: Value of the structure restriction when the topology input is empty. (Contributed by Mario Carneiro, 13-Aug-2015.) |
Ref | Expression |
---|---|
0rest | ⊢ (∅ ↾t 𝐴) = ∅ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0ex 4718 | . . . 4 ⊢ ∅ ∈ V | |
2 | restval 15910 | . . . 4 ⊢ ((∅ ∈ V ∧ 𝐴 ∈ V) → (∅ ↾t 𝐴) = ran (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴))) | |
3 | 1, 2 | mpan 702 | . . 3 ⊢ (𝐴 ∈ V → (∅ ↾t 𝐴) = ran (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴))) |
4 | mpt0 5934 | . . . . 5 ⊢ (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴)) = ∅ | |
5 | 4 | rneqi 5273 | . . . 4 ⊢ ran (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴)) = ran ∅ |
6 | rn0 5298 | . . . 4 ⊢ ran ∅ = ∅ | |
7 | 5, 6 | eqtri 2632 | . . 3 ⊢ ran (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴)) = ∅ |
8 | 3, 7 | syl6eq 2660 | . 2 ⊢ (𝐴 ∈ V → (∅ ↾t 𝐴) = ∅) |
9 | relxp 5150 | . . . 4 ⊢ Rel (V × V) | |
10 | restfn 15908 | . . . . . 6 ⊢ ↾t Fn (V × V) | |
11 | fndm 5904 | . . . . . 6 ⊢ ( ↾t Fn (V × V) → dom ↾t = (V × V)) | |
12 | 10, 11 | ax-mp 5 | . . . . 5 ⊢ dom ↾t = (V × V) |
13 | 12 | releqi 5125 | . . . 4 ⊢ (Rel dom ↾t ↔ Rel (V × V)) |
14 | 9, 13 | mpbir 220 | . . 3 ⊢ Rel dom ↾t |
15 | 14 | ovprc2 6583 | . 2 ⊢ (¬ 𝐴 ∈ V → (∅ ↾t 𝐴) = ∅) |
16 | 8, 15 | pm2.61i 175 | 1 ⊢ (∅ ↾t 𝐴) = ∅ |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1475 ∈ wcel 1977 Vcvv 3173 ∩ cin 3539 ∅c0 3874 ↦ cmpt 4643 × cxp 5036 dom cdm 5038 ran crn 5039 Rel wrel 5043 Fn wfn 5799 (class class class)co 6549 ↾t crest 15904 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-reu 2903 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-1st 7059 df-2nd 7060 df-rest 15906 |
This theorem is referenced by: firest 15916 topnval 15918 resstopn 20800 ussval 21873 bj-rest00 32215 |
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