Theorem 19.2 713

Description: Theorem 19.2 of [Margaris] p. 89.

Assertion

Ref	Expression
19.2	|- (A.xph -> E.xph)

Proof of Theorem 19.2

Step	Hyp	Ref	Expression
1		19.8a 712	. 2 |- (ph -> E.xph)
2	1	a4s 682	1 |- (A.xph -> E.xph)

Syntax hints:   -> wi 2  A.wal 672  E.wex 678

This theorem is referenced by:  19.39 761  19.24 762  19.34 772

This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673

This theorem depends on definitions:  df-bi 128  df-ex 679

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