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Jun
26
comment How to take the inverse of this signal?
You were faster, I erased my answer. ;-)
Jun
26
answered Puzzle: $(\Box @)+(\Box @) = (\Box\bigstar\Box$)
Jun
26
answered Eigenvectors of a normal matrix
Jun
26
answered How common is the use of the term “primitive” to mean “antiderivative”?
Jun
26
comment Plane intersecting line segment
The objects you called $dist$ are not distances in the exact sense. They're inner products which can be both positive and negative. There's no reason to divide the debate to the positive and negative case because all the geometrically natural formulae here are linear, rational, or otherwise analytic and they work uniformly both for positive and negative values of the inner products.
Jun
26
comment Plane intersecting line segment
Dear @PUK, if a line belongs to a plane, then it surely is parallel with it. At any rate, when it is so, the intersection - as in set theory - of the plane and the line is the whole line (the very same one). I don't understand in what sense it would make sense to pick two particular points on the line as "better intersections" than all the other points. Also, I am confused by your separate discussion of negative and positive values of $dist.dist$. A fun about maths and algebra is that one may calculate with negative numbers just like with the positive ones w/o splitting derivations.
Jun
25
revised Plane intersecting line segment
added 66 characters in body
Jun
25
revised Plane intersecting line segment
added 32 characters in body
Jun
25
answered Plane intersecting line segment
Jun
18
answered How to partial differential of a trace of matrix form?
Jun
16
answered “Closest pair of points” algorithm
Jun
16
answered Interesting integral related to the Omega Constant/Lambert W Function
Jun
16
awarded  Enthusiast
Jun
14
awarded  Nice Answer
Jun
14
revised Smooth transition between two lines (2d)
added 188 characters in body
Jun
14
comment Smooth transition between two lines (2d)
Thanks, Ross, be sure that I like circles, too. ;-)
Jun
14
comment Algebraic proof of a trig matrix identity?
Thanks, @Jyrki, complexophobia is a legitimate concern! :-) If you have time and energy, it would be good if you could write a full-fledged answer. @Peter, thanks to you, too.
Jun
14
answered Smooth transition between two lines (2d)
Jun
14
reviewed Approve Why is $\infty^0$ indeterminate?
Jun
14
answered Why is $\infty^0$ indeterminate?