Description: The real projective line is included in the complex projective line. (Contributed by BJ, 27-Jun-2019)
Ref | Expression | ||
---|---|---|---|
Assertion | bj-rrhatsscchat |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | axresscn | ||
2 | unss1 | ||
3 | 1 2 | ax-mp | |
4 | df-bj-rrhat | ||
5 | df-bj-cchat | ||
6 | 3 4 5 | 3sstr4i |