Theorem syl131anc 1251

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

Hypotheses

Ref	Expression
sylXanc.1	⊢ (𝜑 → 𝜓)
sylXanc.2	⊢ (𝜑 → 𝜒)
sylXanc.3	⊢ (𝜑 → 𝜃)
sylXanc.4	⊢ (𝜑 → 𝜏)
sylXanc.5	⊢ (𝜑 → 𝜂)
syl131anc.6	⊢ ((𝜓 ∧ (𝜒 ∧ 𝜃 ∧ 𝜏) ∧ 𝜂) → 𝜁)

Assertion

Ref	Expression
syl131anc	⊢ (𝜑 → 𝜁)

Proof of Theorem syl131anc

Step	Hyp	Ref	Expression
1		sylXanc.1	. 2 ⊢ (𝜑 → 𝜓)
2		sylXanc.2	. . 3 ⊢ (𝜑 → 𝜒)
3		sylXanc.3	. . 3 ⊢ (𝜑 → 𝜃)
4		sylXanc.4	. . 3 ⊢ (𝜑 → 𝜏)
5	2, 3, 4	3jca 1177	. 2 ⊢ (𝜑 → (𝜒 ∧ 𝜃 ∧ 𝜏))
6		sylXanc.5	. 2 ⊢ (𝜑 → 𝜂)
7		syl131anc.6	. 2 ⊢ ((𝜓 ∧ (𝜒 ∧ 𝜃 ∧ 𝜏) ∧ 𝜂) → 𝜁)
8	1, 5, 6, 7	syl3anc 1238	1 ⊢ (𝜑 → 𝜁)

Syntax hints:   → wi 4   ∧ w3a 978

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 980

This theorem is referenced by:  syl132anc  1256  syl231anc  1258  syl133anc  1261  mulgdir  13020