Theorem ifelpwung 4604

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 3639	. 2 |- if ( ph , A , B ) C_ ( A u. B )
2		unexg 4566	. . 3 |- ( ( A e. V /\ B e. W ) -> ( A u. B ) e. _V )
3		elpw2g 4270	. . 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 2205   _Vcvv 2815   u. cun 3211   C_ wss 3213   ifcif 3622   ~Pcpw 3671

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 2207  ax-14 2208  ax-ext 2216  ax-sep 4230  ax-pr 4324  ax-un 4556

This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-rex 2528  df-rab 2531  df-v 2817  df-un 3217  df-in 3219  df-ss 3226  df-if 3623  df-pw 3673  df-sn 3697  df-pr 3698  df-uni 3917

This theorem is referenced by:  ifelpwund  4605  ifelpwun  4606