Description: Define the set of all lines. Definition 6.14, part 2 of Schwabhauser p. 45. See ellines for membership. (Contributed by Scott Fenton, 28-Oct-2013)
Ref | Expression | ||
---|---|---|---|
Assertion | df-lines2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
0 | clines2 | |
|
1 | cline2 | |
|
2 | 1 | crn | |
3 | 0 2 | wceq | |