Theorem 3mix1i 1121

Description: Introduction in triple disjunction. (Contributed by Mario Carneiro, 6-Oct-2014.)

Hypothesis

Ref	Expression
3mixi.1	|- ph

Assertion

Ref	Expression
3mix1i	|- ( ph \/ ps \/ ch )

Proof of Theorem 3mix1i

Step	Hyp	Ref	Expression
1		3mixi.1	. 2 |- ph
2		3mix1 1118	. 2 |- ( ph -> ( ph \/ ps \/ ch ) )
3	1, 2	ax-mp 7	1 |- ( ph \/ ps \/ ch )

Syntax hints:   \/ w3o 929

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 671

This theorem depends on definitions:  df-bi 116  df-3or 931

This theorem is referenced by:  tpid1  3581  tpid1g  3582  0z  8917