Theorem spsbim 2394

Description: Specialization of implication. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Andrew Salmon, 25-May-2011.)

Assertion

Ref	Expression
spsbim	|- ( A. x ( ph -> ps ) -> ( [ y / x ] ph -> [ y / x ] ps ) )

Proof of Theorem spsbim

Step	Hyp	Ref	Expression
1		stdpc4 2353	. 2 |- ( A. x ( ph -> ps ) -> [ y / x ] ( ph -> ps ) )
2		sbi1 2392	. 2 |- ( [ y / x ] ( ph -> ps ) -> ( [ y / x ] ph -> [ y / x ] ps ) )
3	1, 2	syl 17	1 |- ( A. x ( ph -> ps ) -> ( [ y / x ] ph -> [ y / x ] ps ) )

Syntax hints:   -> wi 4   A.wal 1481   [wsb 1880

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-10 2019  ax-12 2047  ax-13 2246

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-ex 1705  df-nf 1710  df-sb 1881

This theorem is referenced by:  mo3  2507  bj-hbsb3t  32712  wl-mo3t  33358  pm11.59  38591  sbiota1  38635