# All Questions

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### Surface area of intersecting spheres

Given a sphere of radius 1 centered at the origin and $n$ spheres with radii $r_i$ centered at predefined coordinates, $c_i$, in space, I am after the surface area of the unit sphere that is not ...
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### MathLM: how do I get it?

Really simple question: How do I get a copy of MathLM for my cluster? I have installed grid mathematica server on all of the machines I need but have no idea how to get them to talk. I can see them ...
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### How to use babylon translator in mathematica help? [on hold]

I have mathematica 9 in window seven ,and using babylon 10,but babylon can't read (scanning) words from help of mathematica. Please help me to solution this problem.
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### integration of delay differential equation

i am unable to get the answer for integration of delay differential equation. The solver is returning the input, as it is, in traditional form without giving solution. my input in notebook is: ...
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### Could not obtain the result

I want to calculate the symbolic integral, but I could not obtain the final results from Mathematica. ...
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### Inhomogeneous phase-portrait with StreamPlot

I have a problem with a must-be simple streamplot. The potential function governing the motion is U, and I have the following code in Mathematica: ...
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### Understanding of method for NDSolve

I used automatic method for NDSolve. Then I asked myself - which method Mathemathica prefered? I got an answer for this question on this forum, that I need to use: *Select[Flatten[ ...
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### How do I visualize the result of EdgeColoring[g]?

Combinatorica has a heuristic edge-coloring function EdgeColoring. When I execute it on a graph, the result is a list of integers. My guess is that an integer $i$ ...
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### Finding all instances of length $N$ common subwords in two strings

Given a pair of strings, I'd like to return a list of all common subwords of a fixed length of "n" characters (i.e. contiguous subwords of length "n" that occur in both strings), allowing for ...
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### How to test if any set of pairs contains elements of other list? no matter order of elements

I want to detect if a set of pairs, for example a={{2,5},{6,3},{1,4},{8,7}} contains a given pair, for example tabu={{4,1},{2,6}} but don´t be relevant the order inside pair (pair {i,j} is equal to ...
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### Different Poincaré maps for same Equation

I've seen the Wolfram Poincaré example. I'd like to modify this sample in order to have a list of Poincaré maps. In the example the event is captured only when ...
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### Deformation of pictures

If I get a picture, and imagine it as a complex plane, then given a function how to visualize the resulting deformed picture? Put it in this way: choose the left bottom vertex of the picture as the ...
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a. What is the proportion of Internet users to population in the United States? I am really confused. I don't where to get these information from and how to set up the proportion. b. What countries ...
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### How to switch elements i,j in a list? [duplicate]

Are there any direct function to switch elements i,j in any list? or is necessary to create one with Do / If ? (I don´t ask for making me this function if it doesn´t exists) My target is can ...
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### How should I do to Return a value to a multi-line function? (functional programming)

Minimal Question as resume of my dude (explained after line 10) . Solving this is enough for me: ...
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### SplicedDistribution - different definition across Mathematica 9?

I am having troubles with my notebook. I succesfully defined Asymmetric Laplace Distribution at school using SplicedDistribution function, and Mathematica was able ...
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### How to specify the centre or PlotRange of a Graphics3D?

When I create a Graphics3D, I often want to place an object right at the centre of the box. Initially I thought that the centre was specified by ...
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### Bizarre behavior of With, Compile and Break

I'm guessing this is almost certainly a bug in Compile (because they're fairly common), but it's pretty weird and I spent about an hour tracking down the issue and ...