Theorem syl33anc 1289

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 1204	. 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 1276	1 |- ( ph -> si )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 1005

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 1007

This theorem is referenced by:  strleund  13316  strext  13318  iscnp4  15083  cnpnei  15084  cnptopco  15087  cncnp  15095  cnptopresti  15103  lmtopcnp  15115  txcnp  15136  xmetrtri  15241  bl2in  15268  blhalf  15273  blssps  15292  blss  15293  upgriswlkdc  16355