# All Questions

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142 views

### Change lighting in ChromaticityPlot3D

It looks to me like ChromaticityPlot3D has some default lighting, but unlike most Graphics3D functions the Lighting option doesn't seem to have any effect. However, the documentation states "...
124 views

### Handwriting recognition with Mathematica

I am trying to teach Mathematica to read my handwriting. Since I don't want to ruin my reputation by showing my own handwriting, I am going to use a font called blackjack. Lets say this is a ...
70 views

### Can I make IsomorphicGraphQ consider other properties besides the EdgeRules?

Consider two graphs, which are isomorphic to each other based on the vertices and edges, ...
72 views

### Tensors constructed using KroneckerDelta's - and/or displaying KroneckerDelta as a matrix

I am doing some work in elasticity and as a result am working with tensors. In particular, I would like to calculate the contraction of a fourth order tensor (the stiffness tensor) with a second order ...
16 views

### How can I distribute redefinitions of system functions to parallel kernels?

I'm having some trouble getting my parallel kernels to get wind of user redefinitions of system packages, and I'm looking for the cleanest way to do this - preferably using DistributeDefinitions. To ...
68 views

### Dynamic Plot of non-linear function within DynamicModule yields dynamically changing constant line instead of expected behavior

I'm having a problem with DynamicModule; the code below produces a plot with a line that changes value, based on the slider positions of the parameters, which is very nearly what I want; I would ...
50 views

### Fastest way to import a large undirected graph from .ncol format

Problem: I have a large undirected graph in the .ncol format, and want to get it in to Mathematica. I understand that Mathematica doesn't natively support the ...
102 views

### Mass distribution in NDSolve

I'm trying to model the solar system with NDSolve, basically a numerical n-body solution. I model the initial positions of bodies from a data set thusly: ...
38 views

### Programing the Euler characteristic

The Euler characteristic theorem is a wonderfull theorem not only from the mathematical point of view but also from the scientific view point. Here is a version that I would prefer to program by ...
40 views

### How to read import VRML (.wrl) into Mathematica

I wonder if there is a way to Import VRML objects, e.g. here. The Export of These formats is provided but I did not found a way to Import it. Can anyone help here? (The Goal is to build a model of ...
60 views

### Underflow occurring in computation

I've got an "Underflow occurred in computation" problem. Here's a simplified version of the code: ...
23 views

### Can mathematica's GraphDistance handle complex weights? Or unknown parameters eg. 'x'?

The EdgeWeight property states that the EdgeWeight can be any expression and the GraphDistance function states that in a weighted graph, it will return the minimum of the sum of the weights. So if I ...
56 views

### Rationalize error

The docs state that "Rationalize[x,dx] yields the rational number with smallest denominator that lies within dx of x." However, testing this out it appears to be false. ...
6 views

Why I can not get a result of 2 while giving input of 2.2 as a float. With logic that 2.2 gets converted to 220, than when it goes through the first for loop I am going to get a remainder of 20(which ...
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### Parametric region instead of 3D plot when using parametric plot [closed]

I want to draw a parametric region, that is, a 2d-graph using 2 parameters. However, each time I use ParametricPlot with 2 parameters, Mathematica interprets it as 3D plot. Not even the examples ...
40 views

### Solving linear system with non-commuting coeffcients

Is there a way to solve a linear system of equations where the coefficients do not commute? (Warning: my two-days of looking so far suggest this may be an unsolved math problem, but I figured I could ...
108 views

### Inflate and unite a list of 0D to 2D regions

I've got a List of BoundaryMeshRegions, created via ConvexHullMesh: ...
128 views

### What is the symbol FENone for?

I have run into the symbol FENone multiple times. What is this symbol, and what is it designed to indicate? All I could find is that FE indicates the front-end, but it's unfortunately a very ...
194 views

### Curve fitting with this modified integrated log-normal function and extracting fitted?

The data to be fitted is for y vs x. We have y and x points. We do not have data for w. In fact, w variable is being varied during integration from 1e-9 to 100e-9. The fitting parameters are Ms,sigma,...
59 views

### Coupled differential equation using NDSolve

I am using mathematica to solve a coupled differential equation using NDSOlve and stuck with it. Could you please help me out to figure out the solution. My problem is  A[\omega]:= A''[r]+\frac{f'[...
39 views

### Montgomery Modular reduction

I saw a Mathematica Implementation of Montgomery reduction at Montgomery Modular Exponentiation, a beautiful one by Simon Woods. I ran this in Mathematica and it was fast, but it does not give the ...
24 views

### How to get the numerical result of inverse CDF?

This is my code. And I want to solve the function which contains both Q and L. But Mathematica only gives me a result with "InverseCDF" function, but not a number? I'm not sure whether I use the code ...
46 views

### Line Curvature and Gaussian Curvature [closed]

Use Mathematica to calculate the curvature of the line: Then calculate the Gaussian curvature of the plane Ax+By+Cz=D, in which A, B, C, and D are constants and C≠0 Here are some ...
44 views

### Does Mathematica interprets representations of Dirac's Delta? [duplicate]

Hello I'm trying to take the limit of this expression in Mathematica I know this is a representation of Dirac's Delta (more precisely pi times Delta), but when I do this, the answer is 0. So my ...
493 views

### How to access “Choose Color Scheme” Programmatically

I am designing an App and I want to use the "Choose Color Scheme" tools inside Button. I am looking to have this tool in popup window when the Button is clicked but I can't find the command to get ...
25 views

### Nest function with an incremental parameter? [closed]

Usually, if we use the Nest[] command, it nests the function directly as in Nest[f,x,3] ...