Questions on finding existing Mathematica implementations or expertise to address a clearly stated problem.

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7
votes
0answers
450 views

Problems when solving a nonlinear PDE system with NDSolve

The nonlinear PDE system is actually extracted from a research paper published in 2000 Here is the paper link The authors solved the system by using an ordinary differential equation integrator in ...
5
votes
0answers
171 views

Finding quasi-cliques

What is the best way to identify quasi-cliques in a graph in Mathematica? I don't think it has been implemented, so are there any solutions to do this? Or do I have to export the graph data somehow ...
4
votes
0answers
138 views

Linearised Einstein equations

I need to compute the linearised Einstein Equations around a fixed metric $$g_{μν}=\text{Minkowski metric} + h_{μν}$$ which is not the flat metric. Does anyone know a Mathematica package or a ...
3
votes
0answers
227 views

adaptive histogram equalization

There is an interesting algorithm called contrast enhanced adaptive histogram equalization that does histogram equalization on small segments of an image (and then pastes them back together). I know ...
1
vote
0answers
50 views

Different ways to program a recursive algorithm

Construct f (a numeric function) which takes multiple arguments with the following property: The single argument case $f(x_1)$ is meaningless, and the two-argument ...
1
vote
0answers
44 views

Coppersmith's algorithm like Pari's zncoppersmith?

Is there some Mathematica package (or built-in that I missed) available, more or less equivalent to Pari's zncoppersmith function? Paraphrasing that source: given ...
1
vote
0answers
88 views

Determining the order of continuity (smoothness) of a function

Is there any method to determine the order of continuity of a function (just like an interpolant) over a given domain, or at least determine the continuity on a given order? For example, according to ...
1
vote
0answers
101 views

Implementation of Lubaehevsky-Stillinger Algorithm to pack hard spheres

To generate a model of a polycrystalline material with specified grain size distribution (e.g coming from a Monte Carlo Grain Growth simulation) the Paper "Effects of grain size distribution and ...
0
votes
0answers
59 views

Solving a system of equations with conditional functions

With your help i am getting closer to the solution of my problem. I know that the code is long but most of it is boring definition. At the beginning i am just defining function, which works at the ...
0
votes
0answers
46 views

how to use a tree as a key to construct a table of key values

I have an interesting problem that I was able to summarize in the form of trees, sets, and key value pairs. I have the following sets of keys and values \begin{equation} \begin{aligned} k_0 &= [A]...