Theorem alimd 2251

Description: Deduction form of Theorem 19.20 of [Margaris] p. 90, see alim 1842. See alimdh 1849, alimdv 1950 for variants requiring fewer axioms. (Contributed by Mario Carneiro, 24-Sep-2016.)

Hypotheses

Ref	Expression
alimd.1	⊢ Ⅎ𝑥𝜑
alimd.2	⊢ (𝜑 → (𝜓 → 𝜒))

Assertion

Ref	Expression
alimd	⊢ (𝜑 → (∀𝑥𝜓 → ∀𝑥𝜒))

Proof of Theorem alimd

Step	Hyp	Ref	Expression
1		alimd.1	. . 3 ⊢ Ⅎ𝑥𝜑
2	1	nf5ri 2234	. 2 ⊢ (𝜑 → ∀𝑥𝜑)
3		alimd.2	. 2 ⊢ (𝜑 → (𝜓 → 𝜒))
4	2, 3	alimdh 1849	1 ⊢ (𝜑 → (∀𝑥𝜓 → ∀𝑥𝜒))

This proof depends on syntax axioms:   → wi 4  ∀wal 1567  Ⅎwnf 1815

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1944  ax-6 2001  ax-7 2042  ax-12 2215

This proof depends on definitions:  df-bi 210  df-ex 1812  df-nf 1816

This theorem is used by:  alrimdd  2253  nfald  2361  mo3  2592  2mo  2676  axpowndlem3  10697  dvelimalcased  35761  axsepg5  35886  axextbdist  36692  pm11.71  45524