Theorem gen31 43931

Description: Virtual deduction generalizing rule for one quantifying variable and three virtual hypothesis. gen31 43931 is ggen31 43855 with virtual deductions. (Contributed by Alan Sare, 22-Jun-2012.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypothesis

Ref	Expression
gen31.1	⊢ (   𝜑   ,   𝜓   ,   𝜒   ▶   𝜃   )

Assertion

Ref	Expression
gen31	⊢ (   𝜑   ,   𝜓   ,   𝜒   ▶   ∀𝑥𝜃   )

Distinct variable groups:   𝜒,𝑥   𝜑,𝑥   𝜓,𝑥

Allowed substitution hint:   𝜃(𝑥)

Proof of Theorem gen31

Step	Hyp	Ref	Expression
1		gen31.1	. . . 4 ⊢ (   𝜑   ,   𝜓   ,   𝜒   ▶   𝜃   )
2	1	dfvd3i 43902	. . 3 ⊢ (𝜑 → (𝜓 → (𝜒 → 𝜃)))
3	2	ggen31 43855	. 2 ⊢ (𝜑 → (𝜓 → (𝜒 → ∀𝑥𝜃)))
4	3	dfvd3ir 43903	1 ⊢ (   𝜑   ,   𝜓   ,   𝜒   ▶   ∀𝑥𝜃   )

Syntax hints:  ∀wal 1531  (   wvd3 43897

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905

This theorem depends on definitions:  df-bi 206  df-an 396  df-3an 1086  df-vd3 43900

This theorem is referenced by:  onfrALTlem2VD  44199