Theorem ralun 3154

Description: Restricted quantification over union. (Contributed by Jeff Madsen, 2-Sep-2009.)

Assertion

Ref	Expression
ralun	|- ( ( A. x e. A ph /\ A. x e. B ph ) -> A. x e. ( A u. B ) ph )

Proof of Theorem ralun

Step	Hyp	Ref	Expression
1		ralunb 3153	. 2 |- ( A. x e. ( A u. B ) ph <-> ( A. x e. A ph /\ A. x e. B ph ) )
2	1	biimpri 131	1 |- ( ( A. x e. A ph /\ A. x e. B ph ) -> A. x e. ( A u. B ) ph )

Syntax hints:   -> wi 4   /\ wa 102   A.wral 2348   u. cun 2971

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063

This theorem depends on definitions:  df-bi 115  df-tru 1287  df-nf 1390  df-sb 1686  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-ral 2353  df-v 2603  df-un 2977

This theorem is referenced by:  ac6sfi  6379  uzsinds  9428  fimaxre2  10109