Theorem 3ex 7991

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 7990	. 2 |- 3 e. CC
2	1	elexi 2567	1 |- 3 e. _V

Syntax hints:   e. wcel 1393   _Vcvv 2557   CCcc 6887   3c3 7965

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-11 1397  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-resscn 6976  ax-1re 6978  ax-addrcl 6981

This theorem depends on definitions:  df-bi 110  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-v 2559  df-in 2924  df-ss 2931  df-2 7973  df-3 7974

This theorem is referenced by:  fztpval  8945