Theorem un10 41938

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

Hypothesis

Ref	Expression
un10.1	⊢ (   (   𝜑   ,   ⊤   )   ▶   𝜓   )

Assertion

Ref	Expression
un10	⊢ (   𝜑   ▶   𝜓   )

Proof of Theorem un10

Step	Hyp	Ref	Expression
1		tru 1546	. . . 4 ⊢ ⊤
2	1	jctr 528	. . 3 ⊢ (𝜑 → (𝜑 ∧ ⊤))
3		un10.1	. . . 4 ⊢ (   (   𝜑   ,   ⊤   )   ▶   𝜓   )
4	3	dfvd2ani 41733	. . 3 ⊢ ((𝜑 ∧ ⊤) → 𝜓)
5	2, 4	syl 17	. 2 ⊢ (𝜑 → 𝜓)
6	5	dfvd1ir 41723	1 ⊢ (   𝜑   ▶   𝜓   )

Syntax hints:   ∧ wa 399  ⊤wtru 1543  (   wvd1 41719  (   wvhc2 41730

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 210  df-an 400  df-tru 1545  df-vd1 41720  df-vhc2 41731

This theorem is referenced by: (None)