Theorem ee102 41011

Description: e102 41010 without virtual deductions. (Contributed by Alan Sare, 14-Jul-2011.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypotheses

Ref	Expression
ee102.1	⊢ (𝜑 → 𝜓)
ee102.2	⊢ 𝜒
ee102.3	⊢ (𝜑 → (𝜃 → 𝜏))
ee102.4	⊢ (𝜓 → (𝜒 → (𝜏 → 𝜂)))

Assertion

Ref	Expression
ee102	⊢ (𝜑 → (𝜃 → 𝜂))

Proof of Theorem ee102

Step	Hyp	Ref	Expression
1		ee102.1	. . 3 ⊢ (𝜑 → 𝜓)
2	1	a1d 25	. 2 ⊢ (𝜑 → (𝜃 → 𝜓))
3		ee102.2	. . . 4 ⊢ 𝜒
4	3	a1i 11	. . 3 ⊢ (𝜃 → 𝜒)
5	4	a1i 11	. 2 ⊢ (𝜑 → (𝜃 → 𝜒))
6		ee102.3	. 2 ⊢ (𝜑 → (𝜃 → 𝜏))
7		ee102.4	. 2 ⊢ (𝜓 → (𝜒 → (𝜏 → 𝜂)))
8	2, 5, 6, 7	ee222 40843	1 ⊢ (𝜑 → (𝜃 → 𝜂))

Syntax hints:   → wi 4

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 209  df-an 399

This theorem is referenced by: (None)