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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 5240 | . . . 4 ⊢ ∅ ∈ V | |
2 | restval 17182 | . . . 4 ⊢ ((∅ ∈ V ∧ 𝐴 ∈ V) → (∅ ↾t 𝐴) = ran (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴))) | |
3 | 1, 2 | mpan 688 | . . 3 ⊢ (𝐴 ∈ V → (∅ ↾t 𝐴) = ran (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴))) |
4 | mpt0 6605 | . . . . 5 ⊢ (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴)) = ∅ | |
5 | 4 | rneqi 5858 | . . . 4 ⊢ ran (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴)) = ran ∅ |
6 | rn0 5847 | . . . 4 ⊢ ran ∅ = ∅ | |
7 | 5, 6 | eqtri 2764 | . . 3 ⊢ ran (𝑥 ∈ ∅ ↦ (𝑥 ∩ 𝐴)) = ∅ |
8 | 3, 7 | eqtrdi 2792 | . 2 ⊢ (𝐴 ∈ V → (∅ ↾t 𝐴) = ∅) |
9 | relxp 5618 | . . . 4 ⊢ Rel (V × V) | |
10 | restfn 17180 | . . . . . 6 ⊢ ↾t Fn (V × V) | |
11 | 10 | fndmi 6568 | . . . . 5 ⊢ dom ↾t = (V × V) |
12 | 11 | releqi 5699 | . . . 4 ⊢ (Rel dom ↾t ↔ Rel (V × V)) |
13 | 9, 12 | mpbir 230 | . . 3 ⊢ Rel dom ↾t |
14 | 13 | ovprc2 7347 | . 2 ⊢ (¬ 𝐴 ∈ V → (∅ ↾t 𝐴) = ∅) |
15 | 8, 14 | pm2.61i 182 | 1 ⊢ (∅ ↾t 𝐴) = ∅ |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1539 ∈ wcel 2104 Vcvv 3437 ∩ cin 3891 ∅c0 4262 ↦ cmpt 5164 × cxp 5598 dom cdm 5600 ran crn 5601 Rel wrel 5605 (class class class)co 7307 ↾t crest 17176 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-rep 5218 ax-sep 5232 ax-nul 5239 ax-pr 5361 ax-un 7620 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-ral 3063 df-rex 3072 df-reu 3286 df-rab 3287 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-id 5500 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-ov 7310 df-oprab 7311 df-mpo 7312 df-1st 7863 df-2nd 7864 df-rest 17178 |
This theorem is referenced by: firest 17188 topnval 17190 resstopn 22382 ussval 23456 bj-rest00 35296 |
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