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Theorem trunantru 1437
Description: A -/\ identity. (Contributed by Anthony Hart, 22-Oct-2010.) (Proof shortened by Andrew Salmon, 13-May-2011.)
Assertion
Ref Expression
trunantru

Proof of Theorem trunantru
StepHypRef Expression
1 nannot 1351 . 2
2 nottru 1431 . 2
31, 2bitr3i 251 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  <->wb 184  -/\wnan 1343   wtru 1396   wfal 1400
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-an 371  df-nan 1344  df-fal 1401
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