Theorem vsnex 4323

Description: A singleton built on a setvar is a set. (Contributed by BJ, 15-Jan-2025.)

Assertion

Ref	Expression
vsnex	⊢ {𝑥} ∈ V

Proof of Theorem vsnex

Step	Hyp	Ref	Expression
1		dfsn2 3702	. 2 ⊢ {𝑥} = {𝑥, 𝑥}
2		zfpair2 4322	. 2 ⊢ {𝑥, 𝑥} ∈ V
3	1, 2	eqeltri 2305	1 ⊢ {𝑥} ∈ V

Syntax hints:   ∈ wcel 2203  Vcvv 2812  {csn 3688  {cpr 3689

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-sep 4227  ax-pr 4321

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 2814  df-un 3214  df-sn 3694  df-pr 3695

This theorem is referenced by:  hashfibclem  11199