pm2.45 - Metamath Proof Explorer

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Theorem pm2.45 412

Description: Theorem *2.45 of [WhiteheadRussell] p. 106. (Contributed by NM, 3-Jan-2005.)

**Assertion**
Ref	Expression
pm2.45	$\/$

**Proof of Theorem pm2.45**
Step	Hyp	Ref	Expression
1		orc 400	. 2 $\/$
2	1	con3i 150	1 $\/$

Colors of variables: wff setvar class

Syntax hints:

wn 3

wi 4 $\/$ wo 383

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-or 385

This theorem is referenced by: pm2.47 414 dn1 1008 eueq3 3381 outpasch 25647 acopyeu 25725 tgasa1 25739 unbdqndv2lem1 32500