Theorem eqneltrrdOLD 2568

Description: Obsolete proof of eqneltrrd 2567 as of 13-Nov-2019. (Contributed by David Moews, 1-May-2017.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypotheses

Ref	Expression
eqneltrrd.1
eqneltrrd.2

Assertion

Ref	Expression
eqneltrrdOLD

Proof of Theorem eqneltrrdOLD

Step	Hyp	Ref	Expression
1		eqneltrrd.2	. 2
2		eqneltrrd.1	. . 3
3	2	eleq1d 2526	. 2
4	1, 3	mtbid 300	1

Syntax hints:  -.wn 3  ->wi 4  =wceq 1395  e.wcel 1818

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1618  ax-4 1631  ax-5 1704  ax-ext 2435

This theorem depends on definitions:  df-bi 185  df-an 371  df-ex 1613  df-cleq 2449  df-clel 2452