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Mirrors > Home > ILE Home > Th. List > 3orcomb | Unicode version |
Description: Commutation law for triple disjunction. (Contributed by Scott Fenton, 20-Apr-2011.) |
Ref | Expression |
---|---|
3orcomb |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | orcom 647 | . . 3 | |
2 | 1 | orbi2i 679 | . 2 |
3 | 3orass 888 | . 2 | |
4 | 3orass 888 | . 2 | |
5 | 2, 3, 4 | 3bitr4i 201 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 98 wo 629 w3o 884 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 |
This theorem depends on definitions: df-bi 110 df-3or 886 |
This theorem is referenced by: eueq3dc 2715 sotritrieq 4062 |
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