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Theorem necon3bbid 2550
Description: Deduction from equality to inequality. (Contributed by NM, 2-Jun-2007.)
Hypothesis
Ref Expression
necon3bbid.1
Assertion
Ref Expression
necon3bbid

Proof of Theorem necon3bbid
StepHypRef Expression
1 necon3bbid.1 . . . 4
21bicomd 192 . . 3
32necon3abid 2549 . 2
43bicomd 192 1
Colors of variables: wff setvar class
Syntax hints:   wn 3   wi 4   wb 176   wceq 1642   wne 2516
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 177  df-ne 2518
This theorem is referenced by:  necon3bid  2551  eldifsn  3839  brltc  6114  addceq0  6219
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