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Metamath Proof Explorer

Theorem pm2.86i

Description: Inference associated with pm2.86 . (Contributed by NM, 5-Aug-1993) (Proof shortened by Wolf Lammen, 3-Apr-2013)

		Ref	Expression
	Hypothesis	pm2.86i.1	$⊢ (φ \to ψ) \to (φ \to χ)$
	Assertion	pm2.86i	$⊢ φ \to (ψ \to χ)$

Step	Hyp	Ref	Expression
1		pm2.86i.1	$⊢ (φ \to ψ) \to (φ \to χ)$
2	1	jarri	$⊢ ψ \to (φ \to χ)$
3	2	com12	$⊢ φ \to (ψ \to χ)$