Theorem bj-dvv 34624

Description: A special instance of bj-hbaeb2 34621. A lemma for distinct var metavariables. Note that the right-hand side is a closed formula (a sentence). (Contributed by BJ, 6-Oct-2018.)

Assertion

Ref	Expression
bj-dvv	⊢ (∀𝑥 𝑥 = 𝑦 ↔ ∀𝑥∀𝑦 𝑥 = 𝑦)

Proof of Theorem bj-dvv

Step	Hyp	Ref	Expression
1		bj-hbaeb2 34621	1 ⊢ (∀𝑥 𝑥 = 𝑦 ↔ ∀𝑥∀𝑦 𝑥 = 𝑦)

Syntax hints:   ↔ wb 209  ∀wal 1540

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1916  ax-6 1974  ax-7 2019  ax-10 2144  ax-12 2178  ax-13 2371

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 847  df-tru 1545  df-ex 1787  df-nf 1791

This theorem is referenced by: (None)