Theorem ifelpwung 4602

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

Assertion

Ref	Expression
ifelpwung	|- ( ( A e. V /\ B e. W ) -> if ( ph , A , B ) e. ~P ( A u. B ) )

Proof of Theorem ifelpwung

Step	Hyp	Ref	Expression
1		ifssun 3637	. 2 |- if ( ph , A , B ) C_ ( A u. B )
2		unexg 4564	. . 3 |- ( ( A e. V /\ B e. W ) -> ( A u. B ) e. _V )
3		elpw2g 4268	. . 3 |- ( ( A u. B ) e. _V -> ( if ( ph , A , B ) e. ~P ( A u. B ) <-> if ( ph , A , B ) C_ ( A u. B ) ) )
4	2, 3	syl 14	. 2 |- ( ( A e. V /\ B e. W ) -> ( if ( ph , A , B ) e. ~P ( A u. B ) <-> if ( ph , A , B ) C_ ( A u. B ) ) )
5	1, 4	mpbiri 168	1 |- ( ( A e. V /\ B e. W ) -> if ( ph , A , B ) e. ~P ( A u. B ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   e. wcel 2203   _Vcvv 2813   u. cun 3209   C_ wss 3211   ifcif 3620   ~Pcpw 3669

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-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-pr 4322  ax-un 4554

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-rex 2526  df-rab 2529  df-v 2815  df-un 3215  df-in 3217  df-ss 3224  df-if 3621  df-pw 3671  df-sn 3695  df-pr 3696  df-uni 3915

This theorem is referenced by:  ifelpwund  4603  ifelpwun  4604