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 Dec19 awarded Caucus Jul3 comment How to approximate the bounding region of a 2d differentiable mapping locally? Thanks, I used a this package to triangulate the set and apply $f$ on the vertices and then get a Convex Hull of the mapped points. It works ok so far. Jul2 revised How to approximate the bounding region of a 2d differentiable mapping locally? added 163 characters in body Jul2 asked How to approximate the bounding region of a 2d differentiable mapping locally? Jul2 awarded Curious May2 awarded Notable Question May26 awarded Popular Question Apr2 comment Asymmetric random walk with unequal step size other than 1. Still, it is not trivial. I still need to solve high degree polynomials equation for hitting probability. For mean hitting time, it is trivial. Apr2 comment Asymmetric random walk with unequal step size other than 1. the issue is, when $a$ is large, it is not so simple to solve the equations Apr2 asked Asymmetric random walk with unequal step size other than 1. Mar28 accepted How to solve this inhomogeneous recurrence difference equation? Mar27 comment How to solve this inhomogeneous recurrence difference equation? I updated my question as I am only interested in the positive solutions which are not infinity. So far I can only find one for the example case Mar27 comment How to solve this inhomogeneous recurrence difference equation? @vonbrand I updated my question as I am only interested in the positive solutions which are not infinity. So far I can only find one for the example case. Mar27 revised How to solve this inhomogeneous recurrence difference equation? added 66 characters in body Mar27 revised How to solve this inhomogeneous recurrence difference equation? added 49 characters in body Mar27 comment How to solve this inhomogeneous recurrence difference equation? @GlenO No, my question is correct. Mar27 asked How to solve this inhomogeneous recurrence difference equation? Mar16 accepted Is there a known distribution for this permutation with replacement problem? Mar15 comment Is there a known distribution for this permutation with replacement problem? @MatemáticosChibchas see update Mar15 revised Is there a known distribution for this permutation with replacement problem? added 112 characters in body