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On the intersection of ACM curves in $\mathbb{P}$
Hartshorne, Robin; Miró-Roig, Rosa M. (Rosa Maria)
Universitat de Barcelona
Bezout's theorem gives us the degree of intersection of two properly intersecting projective varieties. As two curves in $\mathbb{P}$ never intersect properly, Bezout's theorem cannot be directly used to bound the number of intersection points of such curves. In this work, we bound the maximum number of intersection points of two integral ACM curves in $\mathbb{P}$. The bound that we give is in many cases optimal as a function of only the degrees and the initial degrees of the curves.
Geometria algebraica
Algebraic geometry
cc-by-nc-nd (c) Elsevier B.V., 2015
Elsevier B.V.

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