# All Questions

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### numerical integration takes so long? [closed]

to evaluate this line, Mathematica.10 takes more than 10h?!! Table[{x, (Re[ NIntegrate[f[x,y], {y, -x/a, x/a}, Method -> "UnitCubeRescaling"]])}, {x, 1, 200, 1}] where f[x,y] is a ...
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### String option names for Cells

They seem to be correctly interpreted. I'm asking because of some minor reasons and a major one: NotebookWrite a Cell with WholeCellGroupOpener option I don't know any official confirmation so let ...
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### How do I diagonalize a matrix? [closed]

How do I diagonalize the following matrix: ...
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### InterpolatingPolynomial::poised error

When entering: ...
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### How can we show the boundary of a WordCloud shape?

WordCloud can arrange the words inside a shape. ...
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### Optimal way to search for Fibonacci $≡−1 \pmod {p^2}$ [closed]

I came upon this question, and see a few people brute force searching for a prime $p>3$ such that the Fibonacci number $F_{np}≡−1 \pmod {p^2}$ for some natural number $n$ I was wondering how ...
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### problem in mathematica [duplicate]

Is there is any problem in Mathematica? Whenever I first time run the code it gives exact output but at the same time when I run it again it starts giving error. I evaluate the notebook whenever I run ...
38 views

### Combining Plot and ListPlot using appropriate colours [closed]

I have Plot and ListPlot and I want to combine the using Show: ...
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### How to use EvenQ[] in patterns? [duplicate]

This works: (w[1] + w[2] + w[3]) /. w[s_] -> If[s == 2, w[s], 0] (* w[2] *) This doesn't: ...
126 views

### Finding the equation of a level curve

Is there a way in Mathematica to determine a parametric equation of a level curve in Mathematica. For example, consider: ...
29 views

### Kernel crash during numerical integral related to internet connection and WolframAutoUpdate

I am having silent kernel crashes whenever I attempt to evaluate a difficult 2D numerical integral. It is not consistently repeatable, in the sense that sometimes the same integral will evaluate ...
271 views

### How can I tell why Mathematica returns no solution to this system of nonlinear equations?

I'm trying to solve a system of 12 equations and 12 unknowns with the code below. ...