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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 4350 | . . 3 ⊢ ∅ ⊆ 𝐴 | |
| 2 | 0ex 5261 | . . 3 ⊢ ∅ ∈ V | |
| 3 | eqid 2761 | . . . 4 ⊢ (∅ ↾s 𝐴) = (∅ ↾s 𝐴) | |
| 4 | base0 17392 | . . . 4 ⊢ ∅ = (Base‘∅) | |
| 5 | 3, 4 | ressid2 17412 | . . 3 ⊢ ((∅ ⊆ 𝐴 ∧ ∅ ∈ V ∧ 𝐴 ∈ V) → (∅ ↾s 𝐴) = ∅) |
| 6 | 1, 2, 5 | mp3an12 1480 | . 2 ⊢ (𝐴 ∈ V → (∅ ↾s 𝐴) = ∅) |
| 7 | reldmress 17410 | . . 3 ⊢ Rel dom ↾s | |
| 8 | 7 | ovprc2 7460 | . 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 1570 ∈ wcel 2145 Vcvv 3451 ⊆ wss 3899 ∅c0 4279 (class class class)co 7420 ↾s cress 17408 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-cnex 11256 ax-1cn 11258 ax-addcl 11260 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 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 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-nn 12336 df-slot 17360 df-ndx 17372 df-base 17388 df-ress 17409 |
| This theorem is used by: ressress 17425 symgval 19585 invrfval 20619 dsmmval 22040 dsmmval2 22042 mplval 22296 ply1val 22512 resvsca 33893 |
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