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Theorem xorneg 1375
Description: \/_ is unchanged under negation of both arguments. (Contributed by Mario Carneiro, 4-Sep-2016.)
Assertion
Ref Expression
xorneg

Proof of Theorem xorneg
StepHypRef Expression
1 xorneg1 1373 . 2
2 xorneg2 1374 . . 3
32con2bii 332 . 2
41, 3bitr4i 252 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  <->wb 184  \/_wxo 1363
This theorem is referenced by:  hadnot  1460  had0  1471
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 185  df-xor 1364
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