Theorem bnj836 32740

Description: ∧-manipulation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)

Hypotheses

Ref	Expression
bnj836.1	⊢ (𝜂 ↔ (𝜑 ∧ 𝜓 ∧ 𝜒))
bnj836.2	⊢ (𝜓 → 𝜏)

Assertion

Ref	Expression
bnj836	⊢ (𝜂 → 𝜏)

Proof of Theorem bnj836

Step	Hyp	Ref	Expression
1		bnj836.1	. 2 ⊢ (𝜂 ↔ (𝜑 ∧ 𝜓 ∧ 𝜒))
2		bnj836.2	. . 3 ⊢ (𝜓 → 𝜏)
3	2	3ad2ant2 1133	. 2 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) → 𝜏)
4	1, 3	sylbi 216	1 ⊢ (𝜂 → 𝜏)

Syntax hints:   → wi 4   ↔ wb 205   ∧ w3a 1086

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 206  df-an 397  df-3an 1088

This theorem is referenced by:  bnj1379  32810  bnj1175  32984  bnj1286  32999  bnj1450  33030  bnj1501  33047  bnj1523  33051