Theorem relssdv 5212

Description: Deduction from subclass principle for relations. (Contributed by NM, 11-Sep-2004.)

Hypotheses

Ref	Expression
relssdv.1	|- ( ph -> Rel A )
relssdv.2	|- ( ph -> ( <. x , y >. e. A -> <. x , y >. e. B ) )

Assertion

Ref	Expression
relssdv	|- ( ph -> A C_ B )

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

Proof of Theorem relssdv

Step	Hyp	Ref	Expression
1		relssdv.2	. . 3 |- ( ph -> ( <. x , y >. e. A -> <. x , y >. e. B ) )
2	1	alrimivv 1856	. 2 |- ( ph -> A. x A. y ( <. x , y >. e. A -> <. x , y >. e. B ) )
3		relssdv.1	. . 3 |- ( ph -> Rel A )
4		ssrel 5207	. . 3 |- ( Rel A -> ( A C_ B <-> A. x A. y ( <. x , y >. e. A -> <. x , y >. e. B ) ) )
5	3, 4	syl 17	. 2 |- ( ph -> ( A C_ B <-> A. x A. y ( <. x , y >. e. A -> <. x , y >. e. B ) ) )
6	2, 5	mpbird 247	1 |- ( ph -> A C_ B )

Syntax hints:   -> wi 4   <-> wb 196   A.wal 1481   e. wcel 1990   C_ wss 3574   <.cop 4183   Rel wrel 5119

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-clab 2609  df-cleq 2615  df-clel 2618  df-in 3581  df-ss 3588  df-opab 4713  df-xp 5120  df-rel 5121

This theorem is referenced by:  relssres  5437  poirr2  5520  sofld  5581  relssdmrn  5656  funcres2  16558  wunfunc  16559  fthres2  16592  pospo  16973  joindmss  17007  meetdmss  17021  clatl  17116  subrgdvds  18794  opsrtoslem2  19485  txcls  21407  txdis1cn  21438  txkgen  21455  qustgplem  21924  metustid  22359  metustexhalf  22361  ovoliunlem1  23270  dvres2  23676  cvmlift2lem12  31296  dib2dim  36532  dih2dimbALTN  36534  dihmeetlem1N  36579  dihglblem5apreN  36580  dihmeetlem13N  36608  dihjatcclem4  36710