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Theorem neleq2OLD 2798
Description: Obsolete proof of neleq2 2797 as of 25-Nov-2019. (Contributed by NM, 20-Nov-1994.) (Proof modification is discouraged.) (New usage is discouraged.)
Assertion
Ref Expression
neleq2OLD

Proof of Theorem neleq2OLD
StepHypRef Expression
1 eleq2 2530 . . 3
21notbid 294 . 2
3 df-nel 2655 . 2
4 df-nel 2655 . 2
52, 3, 43bitr4g 288 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  ->wi 4  <->wb 184  =wceq 1395  e.wcel 1818  e/wnel 2653
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-ext 2435
This theorem depends on definitions:  df-bi 185  df-an 371  df-ex 1613  df-cleq 2449  df-clel 2452  df-nel 2655
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