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| Mirrors > Home > MPE Home > Th. List > ress0 | Structured version Visualization version GIF version | ||
| Description: All restrictions of the null set are trivial. (Contributed by Stefan O'Rear, 29-Nov-2014.) (Revised by Mario Carneiro, 30-Apr-2015.) |
| Ref | Expression |
|---|---|
| ress0 | ⊢ (∅ ↾s 𝐴) = ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0ss 4350 | . . 3 ⊢ ∅ ⊆ 𝐴 | |
| 2 | 0ex 5250 | . . 3 ⊢ ∅ ∈ V | |
| 3 | eqid 2734 | . . . 4 ⊢ (∅ ↾s 𝐴) = (∅ ↾s 𝐴) | |
| 4 | base0 17139 | . . . 4 ⊢ ∅ = (Base‘∅) | |
| 5 | 3, 4 | ressid2 17159 | . . 3 ⊢ ((∅ ⊆ 𝐴 ∧ ∅ ∈ V ∧ 𝐴 ∈ V) → (∅ ↾s 𝐴) = ∅) |
| 6 | 1, 2, 5 | mp3an12 1453 | . 2 ⊢ (𝐴 ∈ V → (∅ ↾s 𝐴) = ∅) |
| 7 | reldmress 17157 | . . 3 ⊢ Rel dom ↾s | |
| 8 | 7 | ovprc2 7396 | . 2 ⊢ (¬ 𝐴 ∈ V → (∅ ↾s 𝐴) = ∅) |
| 9 | 6, 8 | pm2.61i 182 | 1 ⊢ (∅ ↾s 𝐴) = ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∈ wcel 2113 Vcvv 3438 ⊆ wss 3899 ∅c0 4283 (class class class)co 7356 ↾s cress 17155 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-1cn 11082 ax-addcl 11084 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-nn 12144 df-slot 17107 df-ndx 17119 df-base 17135 df-ress 17156 |
| This theorem is referenced by: ressress 17172 symgval 19298 invrfval 20323 dsmmval 21687 dsmmval2 21689 mplval 21942 ply1val 22132 resvsca 33362 |
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