Theorem 3ex 9058

Description: 3 is a set (common case). (Contributed by David A. Wheeler, 8-Dec-2018.)

Assertion

Ref	Expression
3ex	|- 3 e. _V

Proof of Theorem 3ex

Step	Hyp	Ref	Expression
1		3cn 9057	. 2 |- 3 e. CC
2	1	elexi 2772	1 |- 3 e. _V

Syntax hints:   e. wcel 2164   _Vcvv 2760   CCcc 7870   3c3 9034

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-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-11 1517  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2175  ax-resscn 7964  ax-1re 7966  ax-addrcl 7969

This theorem depends on definitions:  df-bi 117  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-v 2762  df-in 3159  df-ss 3166  df-2 9041  df-3 9042

This theorem is referenced by:  fztpval  10149  lgsdir2lem3  15146