All Questions

I am trying to solve those equations: ...

I compute a product of Bose operators and turn it into normal ordering using Boson commutation relations, e.g: ...

I have this image data and size: ...

I use a loop to create a set of matrixes Subscript[k[x, y], i], depending on variables [x, y]. Then I create a large matrix <...

ClearAll[sus]; D[sus[i, t], t] /. i -> 1 generates (0,1) sus [1, t] And ...

Suppose that we define UpValues for different symbols isSpecialFunction[N1]^=True isSpecialFunction[N2]^=True isSpecialFunction[N3]^=True I would like to make the ...

I have the following question: Let T = {{0, 0, 2}, {0, 0, 0}, {2, 0, 3}}, I know that its eigenvalues, in a decreasing order, are 4, 0 and -1. Mathematica displays ...

First of all I don't want to use the reflection method. Only Gram-Schmidt. So here's the program for Gram-Schidt: ...

I would like to define a function Cd[a_][expr_] which takes an arbitrary argument a and acts on the expression ...

I am running this code now for hours, which is not even that hard actually, but Mathematica seems to have troubles with it: ...

Please suggest how to export multiple tables in a single excel file. I am trying to use the code given below: ...

Please help align and fix the following tabs. Below is the link: https://kalumbila.com/project.html

Consider a unit sphere. The cube of the maximum size that can be inscribed inside it has the vertices $ (\pm1, \pm1, \pm1)/\sqrt3 $. A tetrahedron can be created from this cube by choosing appropriate ...

I use this code ...

I am trying to connect to a MongoDB remotely using Mathematica. DB Name: http://m0.lmfdb.xyz/ I went to the user mailing list where this code was posted to connect in Python. from pymongo import ...

I have a function F[r] = (-1)^(r + 1) Binomial[n, r]/r I would like to evaluate F[x+1]/F[x] for some arbitrary ...

Write a program that reads an integer from the user and determines whether it is divisible by 2 and 7 or not. Test your program using the following inputs: 12, 28, 42, and 63. Your output should look ...

I am attempting to save out a plot to .eps file, but cannot get the legend to come with it. Copying and pasting the image, saving as a JPEG and converting to .eps loses too much resolution for it too ...

Is there a way to get the tooltip to appear for parts of a string? ...

I'm not that great at using Mathematica so please bear with me. What I'm trying to do here is compute the coefficients of the metric tensor in 3D spherical coordinates, from which I'll construct the ...

I have a function of six variables in total - x1, x2, x3, x11, x22, x33 and I need to perform symbolic integration to get a symbolic expression. Before showing my ...

I try to solve the following IVP (found in a textbook): $\frac{d^2y}{dx^2}=\left(\frac{dy}{dx}\right)^2$ with $y(0)=1$ and $y'(0)=1$. I use reduction of order. Say $u=\frac{dy}{dx}$. Thus $\frac{du}{...

I want to evaluate the following code: However, I do not understand why Mathematica insists there is no closing ")".

I have a problem, where I am trying to find the number of eigenvalues of a matrix smaller than 1. The matrix has a general form, given by ...

I recently saw that Mathematica 10 introduced really nice tools for geography. I would like to use GeoGraphics to visualize all possible paths with a length of half ...

I am working with symbolic tensors within Mathematica and I wanted to ask if there is a way to have a symbolic identity tensor.

How do I find the root of $\qquad x^4+x+c=0$ with $x$ as the variable and $c$ is constant.

I'm a beginner with Mathematica, and I'm running into an issue that I don't quite understand. I define the quantities denom1 = (Sqrt[k^2 + m^2] - p)^2 - k^2 - m^2 ...

I want to plot the fonction $(5,5)\ni w\mapsto \lambda(w,k)$ for $k\in\{1,2,3,4\}$ where $\lambda(w,k)$ is defined below on the penultimate line. The answering time looks infinite and I was not even ...

a) I am thinking of installing Mathematica on supercomputers of my center. and running programs by parallelizing it for faster computations. But I was told that running Mathematica on supercomputers ...

I have a ListPointPlot3D in which all points lie on a plane. I'd like to transform it into a simple 2D Plot by looking at the points from an orthogonal direction to ...

I am new to Mathematica and struggling with its syntax. I have a set of equations, which I would like to solve for my unknowns. I would like to solve the first equation for the first unknown and ...

Context I am interested in solving Transient Gray Scott equations. Following the documentation: I define the equations ...

Let a partition of a planar polygon into colored polygons be given, i.e. something similar to We know the coordinates of the vertices and the color of each part, e. g. in such a way ...

So I have eight 7 bit strings and I need to label it as the vertices of the 7-cube. Then I need to find two complementary vertices(two strings whose corresponding bits are inverted) and a bipartition ...

At present, we are trying to run Mathematica package with C# about m file, C# Code: ...

I am given a list of square matrices (with non numeric entries but abstract symbols which are assumed to take real values) and I want to write a function that returns True if the following condition ...

I have compiled lists of non-diagonal and diagonal entries for a matrix. I'm trying to add elements from the diagonal-entry lists into certain entries of the non-diagonal lists. Is there a feasible ...

I am writing a Fortran function that needs to receive two vectors of reals, and as an output, returns a vector. The function could be for example the sum of the two vectors: ...

I'm making a 3D plot of the function En1 and I'm attributing its color to the sz1 function below, which contains values spanning from -1 to 1. ...

I like this answer, which provides an "autoThread" function for more intelligent threading, but it doesn't work in this example and was hoping for a fix. So for this code: ...

I seems as though what I am interested in is unconventional, but I am interested in defining a number of different variables programmatically. For example I can write a matrix of variables by doing: <...

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I'm having difficulties with a project to show random tiles with a few random colors. Here's the code that I need to modify: ...

Can you buy your dream car that worth \$46,000 after 40 months if (now) you invest an amount of \$30,500 to gain 12% annual interest that compounded each 4 months?

I wish to create to generate the set $\{\pm \, 5^n : n\in \mathbb{N}\cup \{0\} \}$ and solve the equation $a+b =c+d$ for all elements quadruplets $a,b,c,d$ in the set which satisfy it. How would I go ...

is there a way to tell Mathematica to display KroneckerProduct[a,b] with the tensor symbol in general? So, in terms of Latex, a\otimes b ?

I am trying to solve a PDE problem on a 4d manifold (3 space + 1 time). However, NDSolve becomes very slow when I jump from 3 to 4 dimensions. Here I want to integrate a simple ...

I am running into a very weird bug where setting $MinPrecision to some value (in this case 200) has a very different and ...

Recently I have started learning "Effective Field Theory". As a part of learning, I was trying to calculate the vertex factor for a process where two unknown neutral spin-1 bosons $Y$ ...