3orel13 - Mathbox for Scott Fenton

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Theorem 3orel13 31598

Description: Elimination of two disjuncts in a triple disjunction. (Contributed by Scott Fenton, 9-Jun-2011.)

**Assertion**
Ref	Expression
3orel13	$/\$ $\/$ $\/$

**Proof of Theorem 3orel13**
Step	Hyp	Ref	Expression
1		3orel3 31593	. 2 $\/$ $\/$ $\/$
2		orel1 397	. 2 $\/$
3	1, 2	sylan9r 690	1 $/\$ $\/$ $\/$

Colors of variables: wff setvar class

Syntax hints:

wn 3

wi 4 $\/$ wo 383 $/\$ wa 384 $\/$ w3o 1036

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 df-an 386 df-3or 1038

This theorem is referenced by: soseq 31751 nodenselem8 31841