Theorem un01 45598

Description: A unionizing deduction. (Contributed by Alan Sare, 28-Apr-2015.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypothesis

Ref	Expression
un01.1	⊢ (   (   ⊤   ,   𝜑   )   ▶   𝜓   )

Assertion

Ref	Expression
un01	⊢ (   𝜑   ▶   𝜓   )

Proof of Theorem un01

Step	Hyp	Ref	Expression
1		tru 1574	. . . 4 ⊢ ⊤
2	1	jctl 533	. . 3 ⊢ (𝜑 → (⊤ ∧ 𝜑))
3		un01.1	. . . 4 ⊢ (   (   ⊤   ,   𝜑   )   ▶   𝜓   )
4	3	dfvd2ani 45393	. . 3 ⊢ ((⊤ ∧ 𝜑) → 𝜓)
5	2, 4	syl 18	. 2 ⊢ (𝜑 → 𝜓)
6	5	dfvd1ir 45383	1 ⊢ (   𝜑   ▶   𝜓   )

This proof depends on syntax axioms:   ∧ wa 401  ⊤wtru 1571  (   wvd1 45379  (   wvhc2 45390

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This proof depends on definitions:  df-bi 210  df-an 402  df-tru 1573  df-vd1 45380  df-vhc2 45391

This theorem is used by: (None)