Theorem eluniimadm 5905

Description: Membership in the union of an image of a function. (Contributed by Jim Kingdon, 10-Jan-2019.)

Assertion

Ref	Expression
eluniimadm	|- ( F Fn A -> ( B e. U. ( F " A ) <-> E. x e. A B e. ( F ` x ) ) )

Distinct variable groups:   x, A   x, B   x, F

Proof of Theorem eluniimadm

Step	Hyp	Ref	Expression
1		funiunfvdm 5903	. . 3 |- ( F Fn A -> U_ x e. A ( F ` x ) = U. ( F " A ) )
2	1	eleq2d 2301	. 2 |- ( F Fn A -> ( B e. U_ x e. A ( F ` x ) <-> B e. U. ( F " A ) ) )
3		eliun 3974	. 2 |- ( B e. U_ x e. A ( F ` x ) <-> E. x e. A B e. ( F ` x ) )
4	2, 3	bitr3di 195	1 |- ( F Fn A -> ( B e. U. ( F " A ) <-> E. x e. A B e. ( F ` x ) ) )

Syntax hints:   -> wi 4   <-> wb 105   e. wcel 2202   E.wrex 2511   U.cuni 3893   U_ciun 3970   "cima 4728   Fn wfn 5321   ` cfv 5326

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-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  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-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-fv 5334

This theorem is referenced by:  suplocexprlemell  7932