Theorem spimed 2387

Description: Deduction version of spime 2388. Usage of this theorem is discouraged because it depends on ax-13 2371. Use the weaker spimedv 2197 if possible. (Contributed by NM, 14-May-1993.) (Revised by Mario Carneiro, 3-Oct-2016.) (Proof shortened by Wolf Lammen, 19-Feb-2018.) (New usage is discouraged.)

Hypotheses

Ref	Expression
spimed.1	⊢ (𝜒 → Ⅎ𝑥𝜑)
spimed.2	⊢ (𝑥 = 𝑦 → (𝜑 → 𝜓))

Assertion

Ref	Expression
spimed	⊢ (𝜒 → (𝜑 → ∃𝑥𝜓))

Proof of Theorem spimed

Step	Hyp	Ref	Expression
1		spimed.1	. . 3 ⊢ (𝜒 → Ⅎ𝑥𝜑)
2	1	nf5rd 2196	. 2 ⊢ (𝜒 → (𝜑 → ∀𝑥𝜑))
3		ax6e 2382	. . . 4 ⊢ ∃𝑥 𝑥 = 𝑦
4		spimed.2	. . . 4 ⊢ (𝑥 = 𝑦 → (𝜑 → 𝜓))
5	3, 4	eximii 1844	. . 3 ⊢ ∃𝑥(𝜑 → 𝜓)
6	5	19.35i 1886	. 2 ⊢ (∀𝑥𝜑 → ∃𝑥𝜓)
7	2, 6	syl6 35	1 ⊢ (𝜒 → (𝜑 → ∃𝑥𝜓))

Syntax hints:   → wi 4  ∀wal 1541  ∃wex 1787  Ⅎwnf 1791

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1976  ax-7 2018  ax-12 2177  ax-13 2371

This theorem depends on definitions:  df-bi 210  df-an 400  df-ex 1788  df-nf 1792

This theorem is referenced by:  spime  2388  2ax6elem  2469