Description: Disjunction of three antecedents. (Contributed by NM, 13-Sep-2011)
Ref | Expression | ||
---|---|---|---|
Assertion | 3jaob | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3mix1 | |
|
2 | 1 | imim1i | |
3 | 3mix2 | |
|
4 | 3 | imim1i | |
5 | 3mix3 | |
|
6 | 5 | imim1i | |
7 | 2 4 6 | 3jca | |
8 | 3jao | |
|
9 | 7 8 | impbii | |