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Mirrors > Home > MPE Home > Th. List > vn0ALT | Structured version Visualization version GIF version |
Description: Alternate proof of vn0 4337. Shorter, but requiring df-clel 2810, ax-8 2108. (Contributed by NM, 11-Sep-2008.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
vn0ALT | ⊢ V ≠ ∅ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vex 3478 | . 2 ⊢ 𝑥 ∈ V | |
2 | 1 | ne0ii 4336 | 1 ⊢ V ≠ ∅ |
Colors of variables: wff setvar class |
Syntax hints: ≠ wne 2940 Vcvv 3474 ∅c0 4321 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-ext 2703 |
This theorem depends on definitions: df-bi 206 df-an 397 df-tru 1544 df-fal 1554 df-ex 1782 df-sb 2068 df-clab 2710 df-cleq 2724 df-clel 2810 df-ne 2941 df-v 3476 df-dif 3950 df-nul 4322 |
This theorem is referenced by: (None) |
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