Theorem elmpocl2 6251

Description: If a two-parameter class is inhabited, the second argument is in its nominal domain. (Contributed by FL, 15-Oct-2012.) (Revised by Stefan O'Rear, 7-Mar-2015.)

Hypothesis

Ref	Expression
elmpocl.f	|- F = ( x e. A , y e. B |-> C )

Assertion

Ref	Expression
elmpocl2	|- ( X e. ( S F T ) -> T e. B )

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

Allowed substitution hints:   C( x, y)   S( x, y)   T( x, y)   F( x, y)   X( x, y)

Proof of Theorem elmpocl2

Step	Hyp	Ref	Expression
1		elmpocl.f	. . 3 |- F = ( x e. A , y e. B |-> C )
2	1	elmpocl 6249	. 2 |- ( X e. ( S F T ) -> ( S e. A /\ T e. B ) )
3	2	simprd 114	1 |- ( X e. ( S F T ) -> T e. B )

Syntax hints:   -> wi 4   = wceq 1398   e. wcel 2203  (class class class)co 6050   e. cmpo 6052

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-14 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2815  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-br 4110  df-opab 4172  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-iota 5312  df-fun 5354  df-fv 5360  df-ov 6053  df-oprab 6054  df-mpo 6055

This theorem is referenced by:  funsssuppss  6458  suppssfvg  6463  suppcofn  6466  iccssico2  10280  elfzoel2  10480  mhmrcl2  13677  rhmrcl2  14301  cncfrss2  15441  isclwwlkng  16401  clwwlkn0  16403