Theorem ifelpwun 4579

Description: Existence of a conditional class, quantitative version (inference form). (Contributed by BJ, 15-Aug-2024.)

Hypotheses

Ref	Expression
ifelpwun.1	|- A e. _V
ifelpwun.2	|- B e. _V

Assertion

Ref	Expression
ifelpwun	|- if ( ph , A , B ) e. ~P ( A u. B )

Proof of Theorem ifelpwun

Step	Hyp	Ref	Expression
1		ifelpwun.1	. 2 |- A e. _V
2		ifelpwun.2	. 2 |- B e. _V
3		ifelpwung 4577	. 2 |- ( ( A e. _V /\ B e. _V ) -> if ( ph , A , B ) e. ~P ( A u. B ) )
4	1, 2, 3	mp2an 426	1 |- if ( ph , A , B ) e. ~P ( A u. B )

Syntax hints:   e. wcel 2201   _Vcvv 2801   u. cun 3197   ifcif 3604   ~Pcpw 3651

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2203  ax-14 2204  ax-ext 2212  ax-sep 4206  ax-pr 4298  ax-un 4529

This theorem depends on definitions:  df-bi 117  df-tru 1400  df-nf 1509  df-sb 1810  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-rex 2515  df-rab 2518  df-v 2803  df-un 3203  df-in 3205  df-ss 3212  df-if 3605  df-pw 3653  df-sn 3674  df-pr 3675  df-uni 3893

This theorem is referenced by:  fmelpw1o  7467  bj-charfun  16460