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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 4333 | . . 3 ⊢ ∅ ⊆ 𝐴 | |
2 | 0ex 5234 | . . 3 ⊢ ∅ ∈ V | |
3 | eqid 2733 | . . . 4 ⊢ (∅ ↾s 𝐴) = (∅ ↾s 𝐴) | |
4 | base0 16945 | . . . 4 ⊢ ∅ = (Base‘∅) | |
5 | 3, 4 | ressid2 16973 | . . 3 ⊢ ((∅ ⊆ 𝐴 ∧ ∅ ∈ V ∧ 𝐴 ∈ V) → (∅ ↾s 𝐴) = ∅) |
6 | 1, 2, 5 | mp3an12 1449 | . 2 ⊢ (𝐴 ∈ V → (∅ ↾s 𝐴) = ∅) |
7 | reldmress 16971 | . . 3 ⊢ Rel dom ↾s | |
8 | 7 | ovprc2 7335 | . 2 ⊢ (¬ 𝐴 ∈ V → (∅ ↾s 𝐴) = ∅) |
9 | 6, 8 | pm2.61i 182 | 1 ⊢ (∅ ↾s 𝐴) = ∅ |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∈ wcel 2101 Vcvv 3434 ⊆ wss 3889 ∅c0 4259 (class class class)co 7295 ↾s cress 16969 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2103 ax-9 2111 ax-10 2132 ax-11 2149 ax-12 2166 ax-ext 2704 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7608 ax-cnex 10955 ax-1cn 10957 ax-addcl 10959 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2063 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2884 df-ne 2939 df-ral 3060 df-rex 3069 df-reu 3223 df-rab 3224 df-v 3436 df-sbc 3719 df-csb 3835 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3908 df-nul 4260 df-if 4463 df-pw 4538 df-sn 4565 df-pr 4567 df-op 4571 df-uni 4842 df-iun 4929 df-br 5078 df-opab 5140 df-mpt 5161 df-tr 5195 df-id 5491 df-eprel 5497 df-po 5505 df-so 5506 df-fr 5546 df-we 5548 df-xp 5597 df-rel 5598 df-cnv 5599 df-co 5600 df-dm 5601 df-rn 5602 df-res 5603 df-ima 5604 df-pred 6206 df-ord 6273 df-on 6274 df-lim 6275 df-suc 6276 df-iota 6399 df-fun 6449 df-fn 6450 df-f 6451 df-f1 6452 df-fo 6453 df-f1o 6454 df-fv 6455 df-ov 7298 df-oprab 7299 df-mpo 7300 df-om 7733 df-2nd 7852 df-frecs 8117 df-wrecs 8148 df-recs 8222 df-rdg 8261 df-nn 12002 df-slot 16911 df-ndx 16923 df-base 16941 df-ress 16970 |
This theorem is referenced by: ressress 16986 symgval 19004 invrfval 19943 dsmmval 20969 dsmmval2 20971 mplval 21225 ply1val 21393 resvsca 31557 |
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