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 Feb19 comment Why does this derivation of exponential growth give a different, but apparently not wrong, answer? But we allow this with partial derivatives, don't we? What's the difference? Feb18 asked Why does this derivation of exponential growth give a different, but apparently not wrong, answer? Dec19 awarded Caucus Jul30 comment What fraction of sunlight could we deliberately block out with an occulter? Hagen is right, overall the shadow is equal and opposite to the light hitting the shield. Jul30 accepted What fraction of sunlight could we deliberately block out with an occulter? Jul30 asked What fraction of sunlight could we deliberately block out with an occulter? Jul2 awarded Curious Jun8 accepted How fast will a shape grow if it can grow exponentially only at the border, and growth is limited by crowding? May31 asked How fast will a shape grow if it can grow exponentially only at the border, and growth is limited by crowding? May19 awarded Tumbleweed Mar27 awarded Editor Mar27 revised Pen-and-paper educational games added 70 characters in body Mar27 asked Pen-and-paper educational games Feb17 asked What are the parameters for the edge-match-restricting arcs drawn on Penrose tilings? Feb5 comment How to find the integral $\int_{0}^{\infty}\exp(- (ax+b/x))\,dx$? I've never seen that method before, turning $x=...$ into $dx=...$ what's that called and what's the argument that it's valid? Feb4 comment Is it faster to count to the infinite going one by one or two by two? My maths teacher one told me I was "going nowhere fast." Perhaps this is what he meant... Jan31 awarded Scholar Jan31 accepted When are complex conjugates of solutions not also solutions? Jan29 comment What are the uses of split-complex numbers? @MJD you don't have to represent these numbers as matrices. There's not reason the equivalence should still hold as you extend the number system arbitrarily. Jan29 asked When are complex conjugates of solutions not also solutions?