Description: Distribute restricted universal quantification over "or". (Contributed by Jeff Madsen, 19-Jun-2010) (Proof shortened by Wolf Lammen, 20-Nov-2024)
Ref | Expression | ||
---|---|---|---|
Assertion | 2ralor |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | r19.32v | ||
2 | orcom | ||
3 | 1 2 | bitri | |
4 | 3 | ralbii | |
5 | r19.32v | ||
6 | orcom | ||
7 | 4 5 6 | 3bitri |