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 1d comment How do I solve a system of equations for only one variable quickly? Does using Eliminate help speed up the computation? I have the following in mind: Solve[Eliminate[{…,…,…,…}, {x2,x3,x4}],x1]. Perhaps you could give us a working example? 1d comment How to make Simplify (and FullSimplify) give a default output if $Assumptions are contradictory @MarcoB Well, I guess that example is not a good one. If you try Assuming[x < 0 && x > 0, Simplify[Sign[x]]], you get 1. It has (arbitrarily) picked the second assumption and dropped the first. Nov 19 comment Syntax information “ArgumentsPattern” for function of function? @Szabolcs Would you kindly turn your comment into an answer? I'll accept and this question will go off the unanswered list. Nov 19 comment Escaping out of (or exiting) a Compiled Function @SjoerdC.deVries would you kindly turn your comment into an answer. I'll accept and this question will go off the unanswered list. Nov 5 comment How to solve or plot roots of the equation involves Bessel function of first and second kind? Check out FindRoot Oct 27 comment Why does my MapThread expression fail in this case? v9 also gives the same error Oct 23 comment Input Aliases in Mathematica 10 @murray What is the situation in Mathematica 10.3? Oct 22 comment How to format convert simple Mathematica expressions into a Maxima-compatible format? What if you try running FullForm on the Mathematica output? Then all Sqrt will be expressed as Power[_,1/2]. Then copy the result into Maxima. Oct 17 comment Changing the order of a factor There's not much flexibility in terms of reordering. See mathematica.stackexchange.com/questions/9570/… Oct 12 comment How to bound a recursive Derivative definition? @JerryGuern I don't quite know; if I better understood the relationship between D and Derivative, I think I would know why your version didn't work. Oct 11 comment Edit a Mathematica plot in Illustrator, missing font problem Would you kindly update your answer for Mathematica 10? Copying the fonts to the Adobe\Fonts directory doesn't seem to work anymore. (Mac OSX) Oct 9 comment How to compile self-referencing functions (to perform recursive a task) This is very a helpful workaround. It is unfortunate that recursively defined functions cannot be compiled to WVM Oct 5 comment What are the use cases for different scoping constructs? When I first learned of With, I had original thought it wouldn't create new symbols (which is also what you say). But running With[{i = 2}, f[x_] := i*x] followed by Names["Global*"] in a fresh kernel yields {"f", "i", "x", "x$"}, indicating that on the contrary the symbol i is created (version 10.2). Any idea of what's going on? Oct 5 comment Get dominant terms in asymptotic expansion You can try Series[(*expression here*), {x,Infinity,0},{y,Infinity,0}] Oct 5 comment Computing the first derivative in x, y ,and z This is the way to go. In fact, the replacement is not even necessary. Just do: Derivative[1, 0, 0][f][1,3,0], etc... Oct 4 comment How to delay the definition of a function from the time of package initialization to when it is first called This is wonderful; I am wondering if you know what to do if the function definition that needs to be delayed is not compiled but has a pattern-based downvalue. Something like f[x_]:=f[x_]=x^2 seems not to work because you can't have patterns on both sides of SetDelayed`. Sep 30 comment How to create a documentation page for a given message issued by a (user-defined) function? I think you misunderstood me. I am looking to create a documentation file with Workbench, and have messages link to the appropriate page. Formatting a cell is not what I need. Sep 29 comment What should look for in a computer to render Mathematica graphics faster? @ciao Does Mathematica actually use the GPU to render the 3D plots? I had always thought it was all CPU. Sep 1 comment Advice for Mathematica as Mathematician's Aid Last week I discovered something that is a primitive form of your "dream". There is a palette called "Algebraic Manipulations" that allows you to apply these transformation functions to parts of an InputForm. I found this to be very helpful in some cases. Aug 17 comment Nasty integral advice You can try asking on math.stackexchange. You might get some pointers on how to proceed. Some of the guys on there are real integral wizards. See e.g. math.stackexchange.com/questions/562694/…