Intersection of A Pair of Lines
Let L1 and L2 be a pair of lines, both in a projective plane and expressed in homogeneous coordinates:
where m1 and m2 are slopes and b1 and b2 are y-intercepts. Moreover let g be the duality mapping
which maps lines onto their dual points. Then the intersection of lines L1 and L2 is point P3 where
Read more about this topic: Incidence (geometry)
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“If we are a metaphor of the universe, the human couple is the metaphor par excellence, the point of intersection of all forces and the seed of all forms. The couple is time recaptured, the return to the time before time.”
—Octavio Paz (b. 1914)
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