Theorem ss2abdv 3274

Description: Deduction of abstraction subclass from implication. (Contributed by NM, 29-Jul-2011.)

Hypothesis

Ref	Expression
ss2abdv.1	|- ( ph -> ( ps -> ch ) )

Assertion

Ref	Expression
ss2abdv	|- ( ph -> { x | ps } C_ { x | ch } )

Distinct variable group:   ph, x

Allowed substitution hints:   ps( x)   ch( x)

Proof of Theorem ss2abdv

Step	Hyp	Ref	Expression
1		ss2abdv.1	. . 3 |- ( ph -> ( ps -> ch ) )
2	1	alrimiv 1898	. 2 |- ( ph -> A. x ( ps -> ch ) )
3		ss2ab 3269	. 2 |- ( { x | ps } C_ { x | ch } <-> A. x ( ps -> ch ) )
4	2, 3	sylibr 134	1 |- ( ph -> { x | ps } C_ { x | ch } )

Syntax hints:   -> wi 4   A.wal 1371   {cab 2193   C_ wss 3174

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 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-ext 2189

This theorem depends on definitions:  df-bi 117  df-nf 1485  df-sb 1787  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-in 3180  df-ss 3187

This theorem is referenced by:  ssopab2  4340  iotass  5268  imadif  5373  imain  5375  opabbrex  6012  ssoprab2  6024  tfr1onlemssrecs  6448  tfrcllemssrecs  6461  ss2ixp  6821  ptex  13211  plyss  15325