Theorem vtxvalprc 29203

Description: Degenerated case 4 for vertices: The set of vertices of a proper class is the empty set. (Contributed by AV, 12-Oct-2020.)

Assertion

Ref	Expression
vtxvalprc	⊢ (𝐶 ∉ V → (Vtx‘𝐶) = ∅)

Proof of Theorem vtxvalprc

Step	Hyp	Ref	Expression
1		df-nel 3061	. 2 ⊢ (𝐶 ∉ V ↔ ¬ 𝐶 ∈ V)
2		fvprc 6854	. 2 ⊢ (¬ 𝐶 ∈ V → (Vtx‘𝐶) = ∅)
3	1, 2	sylbi 219	1 ⊢ (𝐶 ∉ V → (Vtx‘𝐶) = ∅)

Syntax hints:  ¬ wn 3   → wi 4   = wceq 1559   ∈ wcel 2141   ∉ wnel 3060  Vcvv 3453  ∅c0 4283  ‘cfv 6516  Vtxcvtx 29154

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-ext 2733  ax-nul 5253  ax-pr 5387

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-ne 2957  df-nel 3061  df-rab 3414  df-v 3455  df-dif 3905  df-un 3907  df-ss 3919  df-nul 4284  df-if 4478  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4863  df-br 5098  df-iota 6472  df-fv 6524

This theorem is referenced by:  wlk0prc  29810