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Theorem snnzg 3687
Description: The singleton of a set is not empty. (Contributed by NM, 14-Dec-2008.)
Assertion
Ref Expression
snnzg (𝐴𝑉 → {𝐴} ≠ ∅)

Proof of Theorem snnzg
StepHypRef Expression
1 snidg 3599 . 2 (𝐴𝑉𝐴 ∈ {𝐴})
2 ne0i 3410 . 2 (𝐴 ∈ {𝐴} → {𝐴} ≠ ∅)
31, 2syl 14 1 (𝐴𝑉 → {𝐴} ≠ ∅)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2135  wne 2334  c0 3404  {csn 3570
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1434  ax-7 1435  ax-gen 1436  ax-ie1 1480  ax-ie2 1481  ax-8 1491  ax-10 1492  ax-11 1493  ax-i12 1494  ax-bndl 1496  ax-4 1497  ax-17 1513  ax-i9 1517  ax-ial 1521  ax-i5r 1522  ax-ext 2146
This theorem depends on definitions:  df-bi 116  df-tru 1345  df-nf 1448  df-sb 1750  df-clab 2151  df-cleq 2157  df-clel 2160  df-nfc 2295  df-ne 2335  df-v 2723  df-dif 3113  df-nul 3405  df-sn 3576
This theorem is referenced by:  snnz  3689  0nelop  4220
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