Theorem biantru 300

Description: A wff is equivalent to its conjunction with truth. (Contributed by NM, 5-Aug-1993.)

Hypothesis

Ref	Expression
biantru.1	|- ph

Assertion

Ref	Expression
biantru	|- ( ps <-> ( ps /\ ph ) )

Proof of Theorem biantru

Step	Hyp	Ref	Expression
1		biantru.1	. 2 |- ph
2		iba 298	. 2 |- ( ph -> ( ps <-> ( ps /\ ph ) ) )
3	1, 2	ax-mp 5	1 |- ( ps <-> ( ps /\ ph ) )

Syntax hints:   /\ wa 103   <-> wb 104

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107

This theorem depends on definitions:  df-bi 116

This theorem is referenced by:  pm4.71  386  mpbiran2  925  isset  2692  rexcom4b  2711  eueq  2855  ssrabeq  3183  a9evsep  4050  pwunim  4208  elvv  4601  elvvv  4602  resopab  4863  funfn  5153  dffn2  5274  dffn3  5283  dffn4  5351  fsn  5592  ixp0x  6620  ac6sfi  6792  fimax2gtri  6795  xrmaxiflemcom  11018