Open jjdishere opened 1 year ago
A concept very useful in Position, and is easy to use in LCPosition.
It is a quotient of Ray and Line is a quotient of it.
directed line need a lot of coersion lemmas, angle can be mk from directed line, 内错角 同旁内角 is easy to formulate using directed line.
Only definition DirLine is written now. All properties waiting to be added
DirLine
A concept very useful in Position, and is easy to use in LCPosition.
It is a quotient of Ray and Line is a quotient of it.