lvella
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 Jul3 accepted Help finding the closed formula for a recurrent relation Jul3 revised Help finding the closed formula for a recurrent relation deleted 4 characters in body Jul2 comment Help finding the closed formula for a recurrent relation Some instrument? Something like limit? If so, I don't even know how to write it down... Jul2 asked Help finding the closed formula for a recurrent relation Jul2 awarded Curious Mar29 comment Why $\cos^3 x - 2 \cos (x) \sin^2(x) = {1\over4}(\cos(x) + 3\cos(3x))$? It is for an assignment, but that is not the goal, I can leave the answer in the form I found it. I was just checking if I got the correct answer with Wolfram Alpha and I got this completely different answer, that I was unable to turn one into the other. Mar29 awarded Commentator Mar29 accepted Why $\cos^3 x - 2 \cos (x) \sin^2(x) = {1\over4}(\cos(x) + 3\cos(3x))$? Mar27 asked Why $\cos^3 x - 2 \cos (x) \sin^2(x) = {1\over4}(\cos(x) + 3\cos(3x))$? Mar26 asked Derivatives of conditionally defined functions Mar13 comment What is a finite dimension subspace contained on an infinite dimension Hilbert space? That thought had not occurred to me, mainly because the very notion of making a linear combination of a non-enumerable infinite set of functions is alien to me... it makes much more sense to me just to define the function itself. Mar12 asked What is a finite dimension subspace contained on an infinite dimension Hilbert space? Sep20 revised Soft question: Unconventional proofs added 8 characters in body Sep20 answered Soft question: Unconventional proofs Aug19 revised Help finding solution for trigonometric equation added 5 characters in body May21 accepted Help finding solution for trigonometric equation Oct25 accepted Basic expression mangling question Oct25 asked Basic expression mangling question Apr12 accepted Center of circle on a stereographic projection Apr12 comment Center of circle on a stereographic projection Cool. Thanks. I thought the same thing just some time after posting. Since then I've been struggling to find the two intersection points between the circle and a meridian passing through the center. I only have the center in euclidean coordinates, and have little idea on how to work with spherical coordinates (I am much more a programmer than a mathematician). As soon as I am able to code it, I'll accept the answer.