Theorem syl3an3 1204

Description: A syllogism inference. (Contributed by NM, 22-Aug-1995.)

Hypotheses

Ref	Expression
syl3an3.1	|- ( ph -> th )
syl3an3.2	|- ( ( ps /\ ch /\ th ) -> ta )

Assertion

Ref	Expression
syl3an3	|- ( ( ps /\ ch /\ ph ) -> ta )

Proof of Theorem syl3an3

Step	Hyp	Ref	Expression
1		syl3an3.1	. . 3 |- ( ph -> th )
2		syl3an3.2	. . . 4 |- ( ( ps /\ ch /\ th ) -> ta )
3	2	3exp 1137	. . 3 |- ( ps -> ( ch -> ( th -> ta ) ) )
4	1, 3	syl7 68	. 2 |- ( ps -> ( ch -> ( ph -> ta ) ) )
5	4	3imp 1132	1 |- ( ( ps /\ ch /\ ph ) -> ta )

Syntax hints:   -> wi 4   /\ w3a 919

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106

This theorem depends on definitions:  df-bi 115  df-3an 921

This theorem is referenced by:  syl3an3b  1207  syl3an3br  1210  vtoclgft  2649  ovmpt2x  5649  ovmpt2ga  5650  nnanq0  6648  apreim  7703  divassap  7778  ltmul2  7934  elfzo  9159  subcn2  10150  mulcn2  10151  ndvdsp1  10332  gcddiv  10408  lcmneg  10456