Description: Choices for an element of an upper interval of integers. (Contributed by Jeff Madsen, 2-Sep-2009)
Ref | Expression | ||
---|---|---|---|
Assertion | uzp1 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uzm1 | |
|
2 | eluzp1p1 | |
|
3 | eluzelcn | |
|
4 | ax-1cn | |
|
5 | npcan | |
|
6 | 3 4 5 | sylancl | |
7 | 6 | eleq1d | |
8 | 2 7 | imbitrid | |
9 | 8 | orim2d | |
10 | 1 9 | mpd | |