trunantru - Metamath Proof Explorer

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Theorem trunantru 1524

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**
Step	Hyp	Ref	Expression
1		nannot 1453	. 2 $-/\$
2		nottru 1518	. 2
3	1, 2	bitr3i 266	1 $-/\$

Colors of variables: wff setvar class

Syntax hints:

wn 3

wb 196 $-/\$ wnan 1447

wtru 1484

wfal 1488

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 197 df-an 386 df-nan 1448 df-fal 1489

This theorem is referenced by: (None)