Theorem ssoprab2i 5613

Description: Inference of operation class abstraction subclass from implication. (Contributed by NM, 11-Nov-1995.) (Revised by David Abernethy, 19-Jun-2012.)

Hypothesis

Ref	Expression
ssoprab2i.1	|- ( ph -> ps )

Assertion

Ref	Expression
ssoprab2i	|- { <. <. x , y >. , z >. | ph } C_ { <. <. x , y >. , z >. | ps }

Distinct variable groups:   x, z   y, z

Allowed substitution hints:   ph( x, y, z)   ps( x, y, z)

Proof of Theorem ssoprab2i

Dummy variable w is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ssoprab2i.1	. . . . 5 |- ( ph -> ps )
2	1	anim2i 334	. . . 4 |- ( ( w = <. x , y >. /\ ph ) -> ( w = <. x , y >. /\ ps ) )
3	2	2eximi 1532	. . 3 |- ( E. x E. y ( w = <. x , y >. /\ ph ) -> E. x E. y ( w = <. x , y >. /\ ps ) )
4	3	ssopab2i 4032	. 2 |- { <. w , z >. | E. x E. y ( w = <. x , y >. /\ ph ) } C_ { <. w , z >. | E. x E. y ( w = <. x , y >. /\ ps ) }
5		dfoprab2 5572	. 2 |- { <. <. x , y >. , z >. | ph } = { <. w , z >. | E. x E. y ( w = <. x , y >. /\ ph ) }
6		dfoprab2 5572	. 2 |- { <. <. x , y >. , z >. | ps } = { <. w , z >. | E. x E. y ( w = <. x , y >. /\ ps ) }
7	4, 5, 6	3sstr4i 3038	1 |- { <. <. x , y >. , z >. | ph } C_ { <. <. x , y >. , z >. | ps }

Syntax hints:   -> wi 4   /\ wa 102   = wceq 1284   E.wex 1421   C_ wss 2973   <.cop 3401   {copab 3838   {coprab 5533

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-14 1445  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-sep 3896  ax-pow 3948  ax-pr 3964

This theorem depends on definitions:  df-bi 115  df-3an 921  df-tru 1287  df-nf 1390  df-sb 1686  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-v 2603  df-un 2977  df-in 2979  df-ss 2986  df-pw 3384  df-sn 3404  df-pr 3405  df-op 3407  df-opab 3840  df-oprab 5536

This theorem is referenced by: (None)