tsor2 - Mathbox for Giovanni Mascellani

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Theorem tsor2 33955

Description: A Tseitin axiom for logical disjunction, in deduction form. (Contributed by Giovanni Mascellani, 25-Mar-2018.)

**Assertion**
Ref	Expression
tsor2	$\/$ $\/$

**Proof of Theorem tsor2**
Step	Hyp	Ref	Expression
1		orc 400	. . 3 $\/$
2	1	imori 429	. 2 $\/$ $\/$
3	2	a1i 11	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: ts3or2 33961