Jay Lemmon
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 Nov 12 accepted Similarity transform with psuedoinverse Jun 8 revised Parallelogram inside of a triangle dependencies corrected spelling Jun 8 suggested approved edit on Parallelogram inside of a triangle dependencies May 16 awarded Notable Question Apr 12 comment Angle Sum of Self-intersecting polygon Hmm, I think the wording of "you get exactly $\pm2\pi$ if the polygon is not self-intersecting" is maybe a little awkward if you didn't mean it as necessary and sufficient. Especially in the context of the OP's question: "Do you think that this can be related to the number of points of intersection or something else?". But reading it again, now, you don't explicitly say anything that would mean sufficient. But I had to read things very carefully not to draw that conclusion. Apr 11 comment Angle Sum of Self-intersecting polygon I think this is only partially right: I think summing to $\pm 2 \pi$ is a necessary but not sufficient condition for not self-intersecting. I seem to be able to come up with polygons where the intersection occurs between edges separated by more than two vertices (so an edge and its neighbor's neighbor), and yet the angles sum to $2\pi$. Mar 31 comment Parameterizing equilateral polygons I tried searching for things online but I'm apparently not very good at it haha :) I'll look at the links you give. What search terms are you using to search with? Mar 31 asked Parameterizing equilateral polygons Dec 24 accepted How many orthogonal matrices map one vector to another? Dec 14 awarded Nice Question Dec 8 comment How many orthogonal matrices map one vector to another? Ah, simple once I see it :) Thanks! Dec 8 asked How many orthogonal matrices map one vector to another? Oct 7 awarded Revival Oct 1 answered Calculators using Taylor polynomials? Sep 24 awarded Autobiographer Sep 23 asked Rotations and inequalities Sep 19 comment LQ decomposition and inequalities Ah, interesting :) And very frustrating for what I'm doing, but oh well. Sep 19 accepted LQ decomposition and inequalities Sep 19 awarded Yearling Sep 19 asked LQ decomposition and inequalities