Theorem unielrel 5264

Description: The membership relation for a relation is inherited by class union. (Contributed by NM, 17-Sep-2006.)

Assertion

Ref	Expression
unielrel	|- ( ( Rel R /\ A e. R ) -> U. A e. U. R )

Proof of Theorem unielrel

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		elrel 4828	. 2 |- ( ( Rel R /\ A e. R ) -> E. x E. y A = <. x , y >. )
2		simpr 110	. 2 |- ( ( Rel R /\ A e. R ) -> A e. R )
3		vex 2805	. . . . . 6 |- x e. _V
4		vex 2805	. . . . . 6 |- y e. _V
5	3, 4	uniopel 4349	. . . . 5 |- ( <. x , y >. e. R -> U. <. x , y >. e. U. R )
6	5	a1i 9	. . . 4 |- ( A = <. x , y >. -> ( <. x , y >. e. R -> U. <. x , y >. e. U. R ) )
7		eleq1 2294	. . . 4 |- ( A = <. x , y >. -> ( A e. R <-> <. x , y >. e. R ) )
8		unieq 3902	. . . . 5 |- ( A = <. x , y >. -> U. A = U. <. x , y >. )
9	8	eleq1d 2300	. . . 4 |- ( A = <. x , y >. -> ( U. A e. U. R <-> U. <. x , y >. e. U. R ) )
10	6, 7, 9	3imtr4d 203	. . 3 |- ( A = <. x , y >. -> ( A e. R -> U. A e. U. R ) )
11	10	exlimivv 1945	. 2 |- ( E. x E. y A = <. x , y >. -> ( A e. R -> U. A e. U. R ) )
12	1, 2, 11	sylc 62	1 |- ( ( Rel R /\ A e. R ) -> U. A e. U. R )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1397   E.wex 1540   e. wcel 2202   <.cop 3672   U.cuni 3893   Rel wrel 4730

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-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-rex 2516  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-opab 4151  df-xp 4731  df-rel 4732

This theorem is referenced by: (None)