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Compilable analog of Nearest?

Is there any analog of Nearest that is compilable? ...
John Taylor's user avatar
  • 4,681
0 votes
0 answers
49 views

Wolfram Engine 13.3.0 dies, is this a bug?

$ wolframscript Wolfram Language 13.3.0 Engine for Linux x86 (64-bit) Copyright 1988-2023 Wolfram Research, Inc. ...
Ytrewq's user avatar
  • 33
0 votes
0 answers
29 views

Solving the Volterra integral equation of the 2nd kind by the method of successive approximations

I solve the Volterra integral equation of the 2nd kind by the method of successive approximations. Please tell me where I made a mistake in using the ...
Mark's user avatar
  • 1
2 votes
1 answer
63 views

Why do Resolve and ForAll fail with trigonometric expressions?

Why Resolve is not able to solve this problem? Similarly Solve and Reduce are not able to do ...
azerbajdzan's user avatar
  • 9,903
2 votes
1 answer
45 views

How to solve solve an ODE that depends on a strictly positive parameter?

To solve the ODE f'' + f = 0 on (0, 1) f(0) = f'(1) = 0. I use the command ...
Akira's user avatar
  • 125
1 vote
3 answers
96 views

Sum of sinusoids at the same frequency but with different amplitudes and phases

Three sinusoids at the same frequency are superimposed: Cos[3.1 - t] + 5 Cos[π/4 + t] + 2 Sin[0.3 + t] How can the resulting oscillation be stated in the following ...
saturnscalypso's user avatar
1 vote
0 answers
49 views

Heaviside function in NDSolve

I have: ...
Tim's user avatar
  • 73
0 votes
0 answers
53 views

Investigate argument of cosh(x) - sinh(x)

I know that cosh(x) and sinh(x) increasingly approach each other as x approaches infinity. How can I investigate, using Mathematica, at what value of x the difference between the functions, i.e., cosh(...
Programmer123's user avatar
0 votes
0 answers
35 views

How to protect generated inline cells from editing?

I want to protect generated inline cell (which contains TeX source) from attempts to edit, since any attempt to regenerate box structure will fail. In particular, suppose in a text cell one creates ...
Acus's user avatar
  • 3,559
0 votes
0 answers
21 views

Simplify argument of Logs

I have the following expression ...
BabaYaga's user avatar
  • 1,604
0 votes
1 answer
50 views

Use Mathematica to implement a Penney's game solver

In Penney's game , player A selects a sequence of heads and tails (of length 3 or larger), and shows this sequence to player B. Player B then selects another sequence of heads and tails of the same ...
138 Aspen's user avatar
  • 877
1 vote
1 answer
35 views

Understanding Parallelization

I'm starting to use Mathematica's parallelization more frequently, and noticed an oddity I would appreciate to be explained. Please feel free to correct my terminology. When on the main kernel, ...
Chloe's user avatar
  • 125
0 votes
0 answers
28 views

If Row & Column are used together, why does the appearance of the formula change?

I expressed the expression of the formula for the limit as a string. ...
Hoony's user avatar
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1 vote
0 answers
22 views

Is there an option for InverseLaplaceTransform to make Mathematica use the convolution theorem when feasible?

By default, it appears that Mathematica won't use the convolution theorem to write an inverse Laplace transform in the form of a convolution of two functions. For example, ...
Matt's user avatar
  • 433
1 vote
2 answers
69 views

Is this definition similar to a while loop?

Good morning. Reading some code in a webpage, I found this expression: X[0] = 0.5; (*edited from x to X*) X[n_ /; 1 <= n] := X[n] = Sin[n] X[n - 1] + Cos[n] Is ...
kurush's user avatar
  • 45
1 vote
1 answer
30 views

How to maintain the form of the formula when using PasteButton?

I want to make a pallet button that keeps the form of the formula intact. ...
Hoony's user avatar
  • 1,520
1 vote
0 answers
83 views

FindRoot + NDSolve + List? [duplicate]

I've noticed that FindRoot fails when its argument involves a component of a list, to which a substitution rule from NDSolve has ...
phonon's user avatar
  • 63
3 votes
2 answers
106 views

Convolving using Integrate function [closed]

Convolving two UnitBox using the Convolve function gives accurate results as fig.1). However, when I try using Integrate function according to the document, the results are different as fig2. What ...
Soon's user avatar
  • 399
3 votes
1 answer
89 views

Understanding NegativelyOrientedPoints and PositivelyOrientedPoints

...
Syed's user avatar
  • 42k
0 votes
1 answer
75 views

How to fold a known planar figure into a spatial geometry?

A planar expansion diagram of a tetrahedron ABCD is shown in the above figure, where the quadrilateral AEFD has a diamond with a side length of 2Sqrt [2], B and C are the midpoints of AE and FD, ...
csn899's user avatar
  • 2,901
2 votes
3 answers
157 views

Numerical solutions of a multivariable equation

I have been desperately trying to find a way to get this equation solved with Mathematica (I am using version 11.1 if that matters): $$ a\sqrt7 + b\sqrt{11} = (\sqrt7 + \sqrt{11})^{13}, $$ assuming ...
Klangen's user avatar
  • 989
3 votes
0 answers
100 views

How to quickly sample points from the given PDF data?

Consider some data (distr.dat). It is a tabulated PDF: x, y, z, PDF[x,y,z], where x is some parameter (and the integral of ...
John Taylor's user avatar
  • 4,681
4 votes
2 answers
86 views

Finding a basis of positive vectors in the kernel of a matrix

The kernel to the left of the matrix ...
florin's user avatar
  • 1,632
3 votes
1 answer
78 views

How to make the z-color of a contour plot mapped on the line?

Ideal picture effect: $$ z=\frac{\frac{u}{1-u}K_{1/3}\left( \frac{u}{3\left( 1-u \right)} \right) +S\cdot \text{Int}\left( u \right) -S\frac{u^2-2u+2}{1-u}K_{2/3}\left( \frac{u}{3\left( 1-u \right)} \...
Vancheers's user avatar
  • 716
2 votes
2 answers
112 views

Plot and mention extremum with corresponding points of extrema

Let ...
SRIJIT GOSWAMI's user avatar
1 vote
0 answers
56 views

Why did the installation of the FFmpeg plugin fail? [closed]

Why did the installation of the FFmpeg plugin fail?
csn899's user avatar
  • 2,901
0 votes
0 answers
38 views

In Plot, different x range shows different result. Is it a bug? [duplicate]

After ODE, plot within {t,0,50} and plot within {t,0,60} have quite different results at some time instants. ...
metroidman's user avatar
1 vote
1 answer
40 views

Method of assigning a number to the number of attempts that have appeared from it, with the first attempt appearing as number 1

I want to assign the first trial that appears as number 1 and the number of trials that appear from there as elements of the list, plus a number. At first, The following listA consisting of {a, b}. In ...
hare's user avatar
  • 406
2 votes
0 answers
54 views

How to apply Esc key as double typing in EventHandler?

I wrote a code to delete the text in InputField with the Esc key. ...
Hoony's user avatar
  • 1,520
1 vote
0 answers
12 views

ChannelObject::connfail Error

My Mathematica keeps deadlock in DynamicEvaluation and throws the following error upon Abort. How to stop this behavior? ...
Everett You's user avatar
  • 2,267
1 vote
0 answers
49 views

Solving polynomial roots of any degree only by Vieta's formula

I have already wrote the code that solves it for quadratic formula and I'm curious if this is possible to make that function work with any kind of polynomial(higher degrees) and solving roots only ...
Karol Bargieł's user avatar
1 vote
0 answers
138 views

Bifurcation and stability analyses of delay differential equations

Are there any packages in Mathematica for bifurcation and stability analyses of delay differential equations? For Matlab, there is a nice tool like: https://twr.cs.kuleuven.be/research/software/delay/...
Tim's user avatar
  • 73
1 vote
1 answer
62 views

Is a four-variable function less than one?

I have the following function of four variables f=Sqrt[(1 + w - x + 4 y z) - Sqrt[4 (-w + x) + (1 + w - x + 4 y z)^2]]/Sqrt[2] I want to show that $f(w,x,y,z)<1$...
Julio Abraham Mendoza Fierro's user avatar
2 votes
1 answer
53 views

Problem finding a function and plotting it

I have the following equation Ls j[t]/Is (1 + (RealAbs[j[t]/Is])^S)^(-1/(S + B)) = 7 Sin[2 \[Pi] 50 t] How can I find the variable j[t] and graph it? Tell me what ...
Vladimir's user avatar
  • 109
2 votes
0 answers
39 views

NextSetPartition

I'm looking for a function similar to the one in the question below, but for the more general problem of set partitions without restricting the set size. NextKSizePartition, or how to partition a set ...
David's user avatar
  • 159
1 vote
1 answer
110 views

Mathematica gives weird solution to $y=xy'+y'$ [closed]

So I am practicing solving differential equations using Mathematica, and I will usually get an answer that I can easily verify. (as in I solve the differential equations myself and then check with ...
CrSb0001's user avatar
  • 125
2 votes
1 answer
158 views

Graphing curves formed by a rolling polygon

I am trying to make a Mathematica graphing function that would generalize common phenomena. How would I do this? From a circle, we can generate a cycloid (if rolling on a line) or a sine wave (if ...
Teg Louis's user avatar
  • 403
3 votes
1 answer
102 views

Effective nested summation

My problem is the following: given a list of probabilities $p_0, p_1, \dots, p_M$ and an integer $n$, I need to compute a function of a real variable $x$ $$W(x) = \sum_{m_1 = 0}^M \sum_{m_2 = 0}^M \...
And R's user avatar
  • 480
1 vote
1 answer
65 views

How to end the sound that is being play?

I'm trying to imitate the way that piano makes a sound and I create a DynamicModule to be the key like the following code: ...
Xinhan Yuan's user avatar
2 votes
0 answers
60 views

Gurobi optimizer license error

How do I set up Mathematica to use the commercial Gurobi optimizer? Mathematica should be able to use it, as the Method -> "Gurobi" option exists for ...
István Zachar's user avatar
1 vote
1 answer
52 views

How to control size and position of the bounding box of ListPlot3D?

I want to create an animation from multiple 3D charts generated by ListPlot3D. Here is a code that generated "test" data for that (it will output frames into a folder ...
Konstantin Konstantinov's user avatar
14 votes
3 answers
1k views

Diploria labyrinthiformis - can we reproduce Ernst Haeckel's drawing of a brain coral?

Ernst Haeckel (1834 - 1919) was a German philosopher, physician, artist and professor of zoology at the University of Jena. He promoted and popularised Charles Darwin's work in Germany. The published ...
eldo's user avatar
  • 48.8k
0 votes
0 answers
47 views

How to ContourPlot within Block? [closed]

I am trying to create a function (using Block function) which produces a ContourPlot and subsequently extracts the points in the ...
Johnson's user avatar
  • 341
2 votes
0 answers
20 views

How can I set characteristic variables for NondimensionalizationTransform?

Apparantly the NondimensionalizationTransform is not throughly documented. There is an SO answer explaining how to use it, but I am having trouble applying it to my problem. I am trying to handle a ...
JS S's user avatar
  • 31
3 votes
1 answer
115 views

NDSolve ignores my NeumannValue boundary conditions

I am trying to solve a simple linear differential equation for $f(x,y)$ on a square with area $L\times L =1$. I consider $(\partial_x^2 + \partial_y^2)f + \partial_x \partial_y f = 0$ with the ...
B. Brekke's user avatar
  • 133
3 votes
0 answers
89 views

Workarounds for unevaluated results of ContourIntegrate of non-analytic functions

There is a new useful command ContourIntegrate since 13.3. I find that the command is well-done, but even the Sun has spots. ...
user64494's user avatar
  • 24.5k
4 votes
1 answer
88 views

Strange result simplifying higher order BesselJ

Consider the following integral: $$\int_0^1 Z_n^m(r)\ J_m(\rho r) r dr$$. The solution of this should contain a single Bessel function: $$(-1)^{(m-n)/2}\ J_{n+1} (\rho)/\rho$$ (see https://www.osti....
AstronomyGeek's user avatar
3 votes
0 answers
60 views

How to fix the size of vectors on surfaces so they are in correct proportion?

I'm having a hard time understanding how vector sizes work with the SliceVectorPlot3D[] function. In my code below, I used a basic inverse square vector field, expecting vectors of the same length on ...
B flat's user avatar
  • 5,493
4 votes
1 answer
150 views

How to plot the elements of a matrix in {x,y,z} coordinates?

I have the {x,y,z} positions of a fullerene and after connecting the first neighbors with ~1.37 and 1.45 distances in the matrix B as the following ...
Lucas Lopes's user avatar
1 vote
0 answers
121 views

How to construct a layered 3D graph of three community structures?

Consider: ...
Tugrul Temel's user avatar
  • 5,490

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