# All Questions

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### ReplaceAll for expressions involving negative power

I have an expression: $exp=1+\frac{1}{x}+\frac{2}{x^{2}}-\frac{3}{x^{3}}$ I am trying to make the following replacement: $\frac{1}{x^{i}}\rightarrow f(i)$, where f is any arbitrary function. The ...
12 views

### Transform a continued fraction to an ordinary fraction

I need to calculate (tranform to a 1-level fraction) the following continued fraction: ...
21 views

### How to plot the region with LineElement when the element number increases?

I want to plot the square wave region for FEM solver, and when the tooth number of the square region is 3, then the total coordinates is 12, when the tooth number of the square region is ...
• 67
12 views

### Alternative Material Models for Finite Element

The Solid Mechanics capabilities of Mathematica make it an interesting alternative to using other software especially when considering multi-physics problems. I would like to collect here (for the ...
• 3,713
39 views

### A puzzle about solving equations

my wolfram version: 13.1 As you can see when I solve this equation directly, I can't solve it Solve[(A \[Pi]^(3/2))/(2 Sqrt[2] a^(3/2)) == 1, A] And when I tweak ...
• 1,192
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### Is there any documentation for vibration and solid mechanics research via Mathematica?

I am interested in the solid mechanics (elastic mechanics and structural mechanics, etc.), and vibration, is there any material or documentation in this aspect via FEM in Mathematica?
• 67
29 views

### Improve performance of DeleteDuplicates for list of matrices

I have a matrix $A_0[x,y,z]$ and a list of matrices $B$ with about 30 matrices. Matrix $A_0$ is a function of some parameters $x,y,z$. I create a new list of matrices, say $A_1$ produced by ...
• 539
10 views

### Does .NET/Link work with .NET 7.0 assemblies?

Is it possible to call methods in a .NET 7.0 assembly from Mathematica? If so, then how is that accomplished? This is my first foray using .NET/Link. I was able to get a test project working that ...
• 271
1 vote
19 views

### Extract Latent Space Learnt from Neural Network

I would like to visualize and cluster vectors learnt in the latent space of a NeuralNetwork. I am trying to clusterize audio tokens, but I don't know what they represent. So the task is to ...
• 445
36 views

### Solving a system with Exponential equations [closed]

Given the following system \begin{align*} 2\cdot 3^x-3 \cdot 2^y&=-22\\ 5\cdot 3^x+\frac{1}{2}\cdot2^y&=9 \end{align*} TThen let $w=3^x$ and $u=2^y$ \begin{aligned} 2\cdot w-3 \cdot ...
1 vote
58 views

### Vertical GrayScale Plot

I'm trying to make a grayscale plot like the one shown below, except I'd like it to plot vertically. ArrayPlot seems to only plot horizontally. Is there a way to make it plot vertically or is there ...
• 5,233
21 views

### How do you save and load a Mathematica object (DataDistribution)? [duplicate]

How do I export and successfully reimport a DataDistribution (or other Mathematica object)? I'm working with an analysis script to run in a cron job regularly. Building the distribution takes some ...
30 views

### How can I use matlab or latex plot the core for cooperative game? [closed]

Consider a game of a function v which has floowing ways $V(1)\geq 12$ $V(2)\geq 7$ $V(3)\geq 10$ $V(1,2)\geq 128$ $V(1,3)\geq 185$ $V(2,3)\geq 18$ $V(1,2,3)=300$ How can I plot such a function in ...
• 1
22 views

### Until Requires Evaluation for each Iteration [closed]

I am trying to better understand Until in Mathematica. To do that, I'm going through the examples in the Mathematica documentation (shown below). My expectation was that I would hit evaluate once, and ...
• 31
1 vote
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• 781
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### Invalid PeriodicBoundaryCondition for Navier Stokes problem using NDSolveValue

Background: I'm looking to have a 2D re-entrant channel of a geophysical flow that is forced by a wind stress at the surface ("taux"; below) and experiences planetary rotation ("cor&...
• 31
1 vote
50 views

### One more incorrect result of FunctionMeromorphic and FunctionAnalytic

Two years ago I submitted a bug in FunctionMeromorphic (That bug still persists in 13.2.). Here is one more incorrect result in it and ...
• 21k
1 vote
65 views

### Sorting by power

I want to sort this table by column "d" such that Mathematica should also take the exponential values into account. Can somebody help me here?
• 11
77 views

### Limit of Taylor coefficients

I want to calculate the following limit: b[n_] := (D[1/(1 - t), {t, n}] /. {t -> 0})/Factorial[n] Limit[b[n], n -> ∞] (* Indeterminate *) where ...
• 23
39 views

### Hyperbolic Fourier series in Mathematica? [closed]

The hyperbolic Fourier series has nonlinear periodicity, and can be applied for wave modeling. https://arxiv.org/abs/2110.00148 The proof herein is quite laborious to reproduce here, but my question ...
• 991
1 vote
52 views

### Function f[a__][b__] with double inputs and definitions/automatic rules

I have a function of the form f[a___][b___] which I would like to apply rules to, for example: ...
• 717
32 views

### Run Initialization in Manipulate Manually

Although I have received a lot of help, there is a rather difficult question. Let we have a system with parameter: $$x_{n+1}=x_n^p$$ As long p changes, we have to ...
• 817
51 views

### A question about integrals and numerical integration

I have a function $f(r)=(1+r/2)^{(-5/r)}-1/r$ and I need to solve the integral of its reciprocal. However, I failed. Is there a way to get the analytical formula of this integral? If it is possible to ...
1 vote
48 views

### Graphing perpendicular vectors to a 3D graph

I am brand new to mathematica, I was wondering how can one obtain a curve similar to this one : Where the vectors are perpendular . Thanks for your help the curve is $f(x,y) = \sin(xy)$ Here is the ...
• 11
1 vote
23 views

### Can Mathematica import uv information from 3d model?

Question1: Does mathematica's supported 3d file format can import uv information such that we can split the model polygons and keep the texture? https://en.wikipedia.org/wiki/UV_mapping Question2: If ...
• 8,429
297 views

### Dot Product and Simplification

How to simplify the expression a b . x/((a b) . x) Where a is a scalar and b and x are vectors. I have tried the usual Simplify, FullSimplify, TensorExpand etc. ...
• 785
384 views

### How can I check if the matrix is of the following form?

\$\left( \begin{array}{cccccc} -a & 0 & 0 & 0 & 0 & 0 \\ 0 & a & 0 & 0 & 0 & 0 \\ 0 & 0 & -a & 0 & 0 & 0 \\ 0 & 0 & 0 & a &...
• 3,399
1 vote