# All Questions

4 views

### Deformation of a piture

If I get a picture, and imagine it as a complex plane, then given a function how to visualize the resulting deformed picture?
3 views

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 ...
14 views

### How to switch elements i,j in a list?

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 ...
11 views

### 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: ...
18 views

54 views

### 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 ...
62 views

### 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 ...
177 views

### 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 ...
46 views

### How to generate all symmetric positive semidefinite 0,1 matrices of a given order [on hold]

The title says it all. There are many instances when we need to check some properties of such matrices. I am looking for an efficient code.
106 views

### RSolve fails on a two-equation non-linear system

I have a system of just two recurrence equations, I need to solve them and so I use RSolve: ...
11 views

### Showiing that matix is an eigenvector? [migrated]

Let A= a b c d be a 2 x 2 matrix, where a,b,c and d are real numbers. We say that A admits an eigenvector if there exists a unit vector u and a real ...
96 views

### Determining the dimension of a probability distribution

Functions like Mean and RandomVariate clearly infer the dimension of the distribution passed to them. One can also usually ...
65 views

### complicated Numerical Integration, FEM application

I am trying to calculate a 2d Integral which has another 2d integral in the integrands. here is the setup: ...
70 views

### Mathematica function Det has unexpected behavior

I am using Mathematica "Kernel" -> {"Version" -> "9.0 for Microsoft Windows (64-bit) (January 25, 2013)", "ReleaseID" -> "9.0.1.0 (4055652, 4055188)" on a Win 7 machine. The file listed below uses ...
68 views

### Generate a list of values with equal number of each value

I want to create a list of 32 values such that from {a,b} I can generate ...
59 views

### Can ParallelDo speed up a counting problem?

How to make parallelize the following code keeping the same "idea". The example I have in mind is more complicated, but I would like to know if a program of this structure can be parallelized? ...
21 views

### Optimizing FindInstance for large systems of Diophantine equations [on hold]

I have a system of Diophantine equations, with about 15 equations and 25 unknowns. To find at least one solution to this system I can use FindInstance and specify the domain to be Integers. But in ...
46 views

### looping in mathemtaica for using the current value as initial state of next value [on hold]

i have some initial state $psi[x,t]$. I perform some operation on it and store the value in another state $pi1[x,t]$. Now on the next step i have to use $psi1[x,t]$ as initial state and perform the ...
66 views

In the documentation of Mathematica it is mentioned that you can use Hyperlink and Tooltip as wrapper in a similar manner as ...
I want to plot a 2-dimensional region with constraint $x+y\le N$, i.e., I want to plot a sub-region inside a 2-simplex. As an example: ...