Theorem syl33anc 1286

Description: Syllogism combined with contraction. (Contributed by NM, 11-Mar-2012.)

Hypotheses

Ref	Expression
sylXanc.1	|- ( ph -> ps )
sylXanc.2	|- ( ph -> ch )
sylXanc.3	|- ( ph -> th )
sylXanc.4	|- ( ph -> ta )
sylXanc.5	|- ( ph -> et )
sylXanc.6	|- ( ph -> ze )
syl33anc.7	|- ( ( ( ps /\ ch /\ th ) /\ ( ta /\ et /\ ze ) ) -> si )

Assertion

Ref	Expression
syl33anc	|- ( ph -> si )

Proof of Theorem syl33anc

Step	Hyp	Ref	Expression
1		sylXanc.1	. . 3 |- ( ph -> ps )
2		sylXanc.2	. . 3 |- ( ph -> ch )
3		sylXanc.3	. . 3 |- ( ph -> th )
4	1, 2, 3	3jca 1201	. 2 |- ( ph -> ( ps /\ ch /\ th ) )
5		sylXanc.4	. 2 |- ( ph -> ta )
6		sylXanc.5	. 2 |- ( ph -> et )
7		sylXanc.6	. 2 |- ( ph -> ze )
8		syl33anc.7	. 2 |- ( ( ( ps /\ ch /\ th ) /\ ( ta /\ et /\ ze ) ) -> si )
9	4, 5, 6, 7, 8	syl13anc 1273	1 |- ( ph -> si )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 1002

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem depends on definitions:  df-bi 117  df-3an 1004

This theorem is referenced by:  strleund  13151  strext  13153  iscnp4  14907  cnpnei  14908  cnptopco  14911  cncnp  14919  cnptopresti  14927  lmtopcnp  14939  txcnp  14960  xmetrtri  15065  bl2in  15092  blhalf  15097  blssps  15116  blss  15117  upgriswlkdc  16101