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Theorem bj-snexg 16682
Description: snexg 4297 from bounded separation. (Contributed by BJ, 5-Oct-2019.) (Proof modification is discouraged.)
Assertion
Ref Expression
bj-snexg (𝐴𝑉 → {𝐴} ∈ V)

Proof of Theorem bj-snexg
StepHypRef Expression
1 dfsn2 3703 . 2 {𝐴} = {𝐴, 𝐴}
2 bj-prexg 16681 . . 3 ((𝐴𝑉𝐴𝑉) → {𝐴, 𝐴} ∈ V)
32anidms 397 . 2 (𝐴𝑉 → {𝐴, 𝐴} ∈ V)
41, 3eqeltrid 2319 1 (𝐴𝑉 → {𝐴} ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2203  Vcvv 2813  {csn 3689  {cpr 3690
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2206  ax-ext 2214  ax-pr 4322  ax-bdor 16586  ax-bdeq 16590  ax-bdsep 16654
This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-v 2815  df-un 3215  df-sn 3695  df-pr 3696
This theorem is referenced by:  bj-snex  16683  bj-sels  16684  bj-sucexg  16692
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