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 Apr 16 answered How to find a point equidistant between two points on a sphere. Apr 16 comment How to find a point equidistant between two points on a sphere. What do you mean by Spherical Geometry? Spherical Coordinates? Apr 13 comment Physical analogy for capacitor behavior? E.g. “water & pipes - flow & pressure” analogy for electric variables. Right, an elastic membrane, but couldn't you do something with a bucket? :P Apr 13 asked Physical analogy for capacitor behavior? E.g. “water & pipes - flow & pressure” analogy for electric variables. Apr 9 revised My brain doesn't work right now: What's the formula for the $n$th vertex of a discretized sine wave? added 8 characters in body Apr 9 comment My brain doesn't work right now: What's the formula for the $n$th vertex of a discretized sine wave? @Michael I don't think $f$ should be in denominator like that, since it just automatically cancels each time. See my answer below Apr 9 answered My brain doesn't work right now: What's the formula for the $n$th vertex of a discretized sine wave? Apr 9 revised My brain doesn't work right now: What's the formula for the $n$th vertex of a discretized sine wave? edited body Apr 9 comment My brain doesn't work right now: What's the formula for the $n$th vertex of a discretized sine wave? @Michael so you're saying $n =$ points per cycle. Okay, then t = k / pointsPerCycle in my code above? Apr 9 comment My brain doesn't work right now: What's the formula for the $n$th vertex of a discretized sine wave? @Michael not sure what you mean. Please make an answer and see my above edit with code. Sorry for my boneheadedness at the moment! Apr 9 revised My brain doesn't work right now: What's the formula for the $n$th vertex of a discretized sine wave? added 347 characters in body Apr 9 asked My brain doesn't work right now: What's the formula for the $n$th vertex of a discretized sine wave? Apr 9 revised How are the groups $U_n$ constructed? added 662 characters in body Apr 9 answered How are the groups $U_n$ constructed? Apr 9 comment How are the groups $U_n$ constructed? They are exactly those elements (minus the 5 in your example). Apr 5 accepted What is this ideal equal to? What is it called? “composition ideal in $R[X]$” Apr 5 comment What is this ideal equal to? What is it called? “composition ideal in $R[X]$” @EricWofsey yes. Apr 5 asked What is this ideal equal to? What is it called? “composition ideal in $R[X]$” Mar 31 revised Relating prime numbers with irreducible polynomials using asymptotic density: is this a known theorem? added 110 characters in body Mar 31 comment Relating prime numbers with irreducible polynomials using asymptotic density: is this a known theorem? @AndréNicolas by automatically even do you mean $2f(X)$?