Theorem neir 2937

Description: Inference associated with df-ne 2935. (Contributed by BJ, 7-Jul-2018.)

Hypothesis

Ref	Expression
neir.1	⊢ ¬ 𝐴 = 𝐵

Assertion

Ref	Expression
neir	⊢ 𝐴 ≠ 𝐵

Proof of Theorem neir

Step	Hyp	Ref	Expression
1		neir.1	. 2 ⊢ ¬ 𝐴 = 𝐵
2		df-ne 2935	. 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐴 = 𝐵)
3	1, 2	mpbir 232	1 ⊢ 𝐴 ≠ 𝐵

Syntax hints:  ¬ wn 3   = wceq 1547   ≠ wne 2934

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 208  df-ne 2935

This theorem is referenced by:  nesymir  2992  vn0  4273  nsuceq0  6395  onnev  6438  nlim2  8415  ax1ne0  11074  ine0  11576  nosgnn0i  27641  1nei  32829  bj-pinftynminfty  37587