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Mirrors > Home > MPE Home > Th. List > vn0ALT | Structured version Visualization version GIF version |
Description: Alternate proof of vn0 4339. Shorter, but requiring df-clel 2806, ax-8 2101. (Contributed by NM, 11-Sep-2008.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
vn0ALT | ⊢ V ≠ ∅ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vex 3475 | . 2 ⊢ 𝑥 ∈ V | |
2 | 1 | ne0ii 4338 | 1 ⊢ V ≠ ∅ |
Colors of variables: wff setvar class |
Syntax hints: ≠ wne 2937 Vcvv 3471 ∅c0 4323 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-ext 2699 |
This theorem depends on definitions: df-bi 206 df-an 396 df-tru 1537 df-fal 1547 df-ex 1775 df-sb 2061 df-clab 2706 df-cleq 2720 df-clel 2806 df-ne 2938 df-v 3473 df-dif 3950 df-nul 4324 |
This theorem is referenced by: (None) |
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