2021-02-21 09:56:47 +0200 | received badge | ● Student (source) |
2021-02-21 09:55:51 +0200 | asked a question | Turning a closed subscheme into a point I have two curves in a two-dimensional projective space. I compute the scheme theoretic-intersection, and then take the irreducible components. Each of these things really is an honest point in P2. How can I get from the closed subscheme form of these points to the actual coordinates? Here's an example. I compute the intersection of the (projective closures of) y=0 and y=x^2-1. The result should be two points, namely [1,0,1] and [-1,0,1]. I can only get as far as p1 and p2, which Sage thinks of as How to I turn it into a point in projective space, like P2([1,0,1])? |