Description: The integers are a subset of the extended reals. (Contributed by Glauco Siliprandi, 23-Oct-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | zssxr | |- ZZ C_ RR* |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zssre | |- ZZ C_ RR |
|
2 | ressxr | |- RR C_ RR* |
|
3 | 1 2 | sstri | |- ZZ C_ RR* |