Theorem al2imi 1387

Description: Inference quantifying antecedent, nested antecedent, and consequent. (Contributed by NM, 5-Aug-1993.)

Hypothesis

Ref	Expression
al2imi.1	⊢ (𝜑 → (𝜓 → 𝜒))

Assertion

Ref	Expression
al2imi	⊢ (∀𝑥𝜑 → (∀𝑥𝜓 → ∀𝑥𝜒))

Proof of Theorem al2imi

Step	Hyp	Ref	Expression
1		al2imi.1	. . 3 ⊢ (𝜑 → (𝜓 → 𝜒))
2	1	alimi 1384	. 2 ⊢ (∀𝑥𝜑 → ∀𝑥(𝜓 → 𝜒))
3		alim 1386	. 2 ⊢ (∀𝑥(𝜓 → 𝜒) → (∀𝑥𝜓 → ∀𝑥𝜒))
4	2, 3	syl 14	1 ⊢ (∀𝑥𝜑 → (∀𝑥𝜓 → ∀𝑥𝜒))

Syntax hints:   → wi 4  ∀wal 1282

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-5 1376  ax-gen 1378

This theorem is referenced by:  alanimi  1388  alimdh  1396  albi  1397  19.30dc  1558  19.33b2  1560  hbnt  1583  ax10o  1643  spimth  1663  sbi1v  1812  ralim  2422  ceqsalt  2625  intss  3657