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| Mirrors > Home > MPE Home > Th. List > ress0 | Structured version Visualization version GIF version | ||
| Description: All restrictions of the empty 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 4349 | . . 3 ⊢ ∅ ⊆ 𝐴 | |
| 2 | 0ex 5260 | . . 3 ⊢ ∅ ∈ V | |
| 3 | eqid 2760 | . . . 4 ⊢ (∅ ↾s 𝐴) = (∅ ↾s 𝐴) | |
| 4 | base0 17401 | . . . 4 ⊢ ∅ = (Base‘∅) | |
| 5 | 3, 4 | ressid2 17421 | . . 3 ⊢ ((∅ ⊆ 𝐴 ∧ ∅ ∈ V ∧ 𝐴 ∈ V) → (∅ ↾s 𝐴) = ∅) |
| 6 | 1, 2, 5 | mp3an12 1480 | . 2 ⊢ (𝐴 ∈ V → (∅ ↾s 𝐴) = ∅) |
| 7 | reldmress 17419 | . . 3 ⊢ Rel dom ↾s | |
| 8 | 7 | ovprc2 7464 | . 2 ⊢ (¬ 𝐴 ∈ V → (∅ ↾s 𝐴) = ∅) |
| 9 | 6, 8 | pm2.61i 184 | 1 ⊢ (∅ ↾s 𝐴) = ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 ∈ wcel 2144 Vcvv 3450 ⊆ wss 3896 ∅c0 4277 (class class class)co 7424 ↾s cress 17417 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 ax-cnex 11263 ax-1cn 11265 ax-addcl 11267 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6307 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7427 df-oprab 7428 df-mpo 7429 df-om 7882 df-2nd 8006 df-frecs 8307 df-wrecs 8338 df-recs 8387 df-rdg 8426 df-nn 12343 df-slot 17369 df-ndx 17381 df-base 17397 df-ress 17418 |
| This theorem is used by: ressress 17434 symgval 19594 invrfval 20628 dsmmval 22049 dsmmval2 22051 mplval 22305 ply1val 22521 resvsca 33943 |
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