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Dear Douglas,

My question: is it possible to obtain with you code the intersection of 2 curves if their intersection is outside the endpoints given? thank you! Laura

I have asked my question wrongly. The intersection is outside the interval of the selected points: e.g;

C1=(627,338),(619,288 ) C2= (621,351), (627,339)

because this gives empty for me and it should intersect

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