Description: The upper integers are unbounded above. (Contributed by Glauco Siliprandi, 2-Jan-2022)
Ref | Expression | ||
---|---|---|---|
Hypotheses | uzubico.1 | ||
uzubico.2 | |||
uzubico.3 | |||
Assertion | uzubico |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uzubico.1 | ||
2 | uzubico.2 | ||
3 | uzubico.3 | ||
4 | 1 2 3 | uzubioo | |
5 | ioossico | ||
6 | ssrexv | ||
7 | 5 6 | ax-mp | |
8 | 4 7 | syl |