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 2d comment How to return multiple types in APIFunction? You should probably return a JSON object in that case. 2d comment Plot for function that calculated direct with while, but is piecewise Why are you multiplying two Print functions? 2d comment Hyperlinks not preserved when saving in PDF format in MMA V10 I can't seem to reproduce this anymore in 10.4 (Windows). Apr 22 comment Exporting sharp corners in Bézier curves to pdf On Windows (with M- 10.4) the arrow is blunted in the front end Apr 22 comment Exporting sharp corners in Bézier curves to pdf I heavily suspect this might be OS dependent. Also what version of Mathematica are you using? Apr 22 comment Unexpected imaginary term in the asymptotic expansion of DawsonF FunctionExpand[DawsonF[x]] probably gives a bit of a clue Apr 14 comment Reading data from Google Docs it likely would Apr 14 comment Reading data from Google Docs Mainly that it shows how one could programmatically access these documents. You would just need to get the "id" and "token". The URL is put in the first URLFetch is really made up of pieces and one can take advantage of that. Apr 13 comment How to calculate a continuous function once and access values later? FunctionsThatRememberValuesTheyHaveFound Mar 24 comment Why is the square of a differential operator not evaluated automatically? true, what result do you want for py[py[f[x,y]]? Mar 24 comment Why is the square of a differential operator not evaluated automatically? I would do something like this: py = (I h D[#, y] - x &) Mar 17 comment Getting rid of sub-exponential terms in an asymptotic expansion for a modified Bessel function Does this help: ComplexExpand[Series[BesselI[n, 2 z], {z, \[Infinity], 2}]] /. Exp[a_ z] /; a < 0 :> 0? It might be too "aggressive" in simply treating z as real. Feb 23 comment ListPointPlot3D with coloured 4th Dimension from List Possible duplicate of Plot 4D data with color as 4th dimension Feb 11 comment Densityplot: isolines great answer, but could be also combined into one plot with: DensityPlot[a[x] - b[x, y], {x, -5, 5}, {y, -5, 5}, MeshFunctions -> (b[#1, #2] &), Mesh -> 5] Feb 10 comment Symbolic expression for recursion no replacement rule is needed if you supply a boundary condition RSolveValue[{f[n] == 2 f[n - 1] + 1, f[1] == 1}, f[n], n] Feb 8 comment How to access a web API with HTTP POST and JSON I generally use URLFetch with the "Headers" and "Body" option. Jan 22 comment WDF specification? I'd report it to support@wolfram.com Nov 30 comment Three Body Problem Equilateral Triangle perhaps hyperspherical coordinates would prove useful? Nov 20 comment Fitting in Mathematica: Which function? How do you define "best"? Oct 21 comment Multiple Import and Export of Images I strongly suspect that ImageFileApply and ImageFileFilter might be useful functions to investigate.