Description: /\ -manipulation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | bnj432 | ⊢ ( ( 𝜑 ∧ 𝜓 ∧ 𝜒 ∧ 𝜃 ) ↔ ( ( 𝜒 ∧ 𝜃 ) ∧ ( 𝜑 ∧ 𝜓 ) ) ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bnj422 | ⊢ ( ( 𝜑 ∧ 𝜓 ∧ 𝜒 ∧ 𝜃 ) ↔ ( 𝜒 ∧ 𝜃 ∧ 𝜑 ∧ 𝜓 ) ) | |
2 | bnj256 | ⊢ ( ( 𝜒 ∧ 𝜃 ∧ 𝜑 ∧ 𝜓 ) ↔ ( ( 𝜒 ∧ 𝜃 ) ∧ ( 𝜑 ∧ 𝜓 ) ) ) | |
3 | 1 2 | bitri | ⊢ ( ( 𝜑 ∧ 𝜓 ∧ 𝜒 ∧ 𝜃 ) ↔ ( ( 𝜒 ∧ 𝜃 ) ∧ ( 𝜑 ∧ 𝜓 ) ) ) |