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Mirrors > Home > ILE Home > Th. List > ax-io | Unicode version |
Description: Definition of 'or'. One of the axioms of propositional logic. (Contributed by Mario Carneiro, 31-Jan-2015.) |
Ref | Expression |
---|---|
ax-io |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wph | . . . 4 | |
2 | wch | . . . 4 | |
3 | 1, 2 | wo 629 | . . 3 |
4 | wps | . . 3 | |
5 | 3, 4 | wi 4 | . 2 |
6 | 1, 4 | wi 4 | . . 3 |
7 | 2, 4 | wi 4 | . . 3 |
8 | 6, 7 | wa 97 | . 2 |
9 | 5, 8 | wb 98 | 1 |
Colors of variables: wff set class |
This axiom is referenced by: jaob 631 bj-inf2vnlem1 10095 |
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