Theorem pm2.86i 64

Description: Inference based on pm2.86 63.

Hypothesis

Ref	Expression
pm2.86i.1	⊢ ((φ → ψ) → (φ → χ))

Assertion

Ref	Expression
pm2.86i	⊢ (φ → (ψ → χ))

Proof of Theorem pm2.86i

Step	Hyp	Ref	Expression
1		pm2.86i.1	. 2 ⊢ ((φ → ψ) → (φ → χ))
2		pm2.86 63	. 2 ⊢ (((φ → ψ) → (φ → χ)) → (φ → (ψ → χ)))
3	1, 2	ax-mp 6	1 ⊢ (φ → (ψ → χ))

Syntax hints:   → wi 2

This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-mp 6

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