Description: Cardinal ordering agrees with natural number ordering. (Contributed by NM, 17-Jun-1998)
Ref | Expression | ||
---|---|---|---|
Assertion | nnsdomo |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nndomo | ||
2 | nneneq | ||
3 | 2 | notbid | |
4 | 1 3 | anbi12d | |
5 | brsdom | ||
6 | dfpss2 | ||
7 | 4 5 6 | 3bitr4g |