Calculating where projective lines intersect

A couple days ago I wrote about homogeneous coordinates projective planes. I said that the lines y = 5 and y = 6 intersect in a point “at infinity.” In projective geometry any two distinct lines intersect in exactly one point, and you can compute that intersection point the same way, whether the intersection is […] The post Calculating where projective lines intersect first appeared on John D. Cook....

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