Theorem syl231anc 1417

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

Hypotheses

Ref	Expression
syl3anc.1	⊢ (𝜑 → 𝜓)
syl3anc.2	⊢ (𝜑 → 𝜒)
syl3anc.3	⊢ (𝜑 → 𝜃)
syl3Xanc.4	⊢ (𝜑 → 𝜏)
syl23anc.5	⊢ (𝜑 → 𝜂)
syl33anc.6	⊢ (𝜑 → 𝜁)
syl231anc.7	⊢ (((𝜓 ∧ 𝜒) ∧ (𝜃 ∧ 𝜏 ∧ 𝜂) ∧ 𝜁) → 𝜎)

Assertion

Ref	Expression
syl231anc	⊢ (𝜑 → 𝜎)

Proof of Theorem syl231anc

Step	Hyp	Ref	Expression
1		syl3anc.1	. . 3 ⊢ (𝜑 → 𝜓)
2		syl3anc.2	. . 3 ⊢ (𝜑 → 𝜒)
3	1, 2	jca 521	. 2 ⊢ (𝜑 → (𝜓 ∧ 𝜒))
4		syl3anc.3	. 2 ⊢ (𝜑 → 𝜃)
5		syl3Xanc.4	. 2 ⊢ (𝜑 → 𝜏)
6		syl23anc.5	. 2 ⊢ (𝜑 → 𝜂)
7		syl33anc.6	. 2 ⊢ (𝜑 → 𝜁)
8		syl231anc.7	. 2 ⊢ (((𝜓 ∧ 𝜒) ∧ (𝜃 ∧ 𝜏 ∧ 𝜂) ∧ 𝜁) → 𝜎)
9	3, 4, 5, 6, 7, 8	syl131anc 1410	1 ⊢ (𝜑 → 𝜎)

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∧ w3a 1103

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This proof depends on definitions:  df-bi 210  df-an 402  df-3an 1105

This theorem is used by:  syl232anc  1424  isosctr  27154  axeuclid  29546  dalawlem3  41023  dalawlem6  41026  cdlemd7  41354  cdleme18c  41443  cdlemi  41970  cdlemk7  41998  cdlemk11  41999  cdlemk7u  42020  cdlemk11u  42021  cdlemk19xlem  42092  cdlemk55u1  42115  cdlemk56  42121