All Questions

When I make a simple plot using ColorFunction, the Mathematica rasterize the plot. Is anyone else having this issue? Does anyone know a way to avoid this? ...

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I want to solve the integral $\int_{p_0}^{p_1}\left(T_0+\Gamma_p(p_0-p)\right)\frac{1}{p}dp$ Mathematica can do the indefinite integral immediately: ...

I do not understand why the following equation cannot be solved in Mathematica. Solve[Log[(-Exp[x] + Sqrt[2 - 3*Exp[2*x]])/2] == c*x, x] The left hand side is ...

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The final task is to revise the question I posed at list rearrangement: I now start with this list: ...

In a notebook, I can easily search an expression for a custom symbol. In[237]:= Position[{mySym, 1, 2}, mySym] Out[237]= {{1}} However, if I write a function and ...

For example,I want to match a multiple partial derivative of a function $f^{(1,0,1)}[x,y,z]$ which is the same as$\frac{\partial^2{f}}{\partial{x}\partial{z}}$.The only information given is the list ...

I have a list: lis = {1, {"AB", 2, 3}, {"ABC", 8, 9}, {"BC", 7}}; ...and I would like to make a new list consisting of all elements ...

There is a large list, with $n$ sublists of the same length (e.g. length is 3). list1 = {{a_1, b_1, c_1}, {a_2, b_2, c_2},..., {a_n, b_n, c_n}} If I need to regard ...

I have a list with quite a few elements. Each element is a rule of the type vector-> number such as {1,2,3,4}->1.435 and ...

recently I have been trying to calculate the following numerical integral \begin{equation} \frac{4 t}{\text{DD}}\frac{1}{2 \pi } \int_{0}^{\infty} dx \int_{0}^{\infty} d\epsilon \frac{\left(\frac{\sin ...

I have fitted a difference equation to some data and would now like to find a differential equation that matches the difference equation. The difference equation and differential equation are $$ y(n)=...

I am trying to define a function that is a solution of a simple ODE with a parameter, for example ...

How to append arbitary list with {0} so that its length becomes a given integer k? For example, when ...

I have a table, say, with about 1000 rows and 6 columns. Out of six elements in a row, first two are independent parameters, while rest four are dependent parameters. Say, the header of the table is <...

What this questions is not: Can I access OEIS from Mathematica? This topic has been raised more than once and has been well addressed. Here's the situation as it seems to me: OEIS is a tremendously ...

I would like to wrap double-struck brackets around variables for notation purposes only. For instance [[X]] should display as the first image below. However, these ...

I'm trying to combine the plot of a function with a vector plot, but no matter what option I choose for VectorPoints, the resulting combined plot just looks ridiculous. For example, the combined plot ...

I recently installed Wolfram Mathematica and attempted to graph a limit, but it seems that it refuses to do so. The equation is $\lim_{x\to e^-}\frac{e}{e-x}$ and the input is Plot[Limit[Divide[e, e - ...

I have a list: lis = {{1,2,3},{"True",3,4,5},{6,5},{3},{6,4},{"True",2,1},{5},{5,6},{7,8,9}} I want to make a new list consisting of elements ...

Suppose I want to prove Sin[2x] - Cos[2x] and 2 Cos[x]Sin[x] + (Sin^2)[x] - (Cos^2)[x] are the same value symbolically how do i ...

Say I define an equation line[t_] = {t, 2t, 3t}. What code will define x[t] = t, y[t] = 2t, ...

For a singular Gram matrix $B$ I need to find some matrix $A$ such that $AA'=B$. I can add a small multiple of identity matrix, but this could break upstream analysis (application is c-approximation ...

Why does this simple FormFunction calling a simple APIFunction not work? I have lots of cloud credits available. A simple API that plots Sin[n x] from between manipulated limits given the input n. <...

I want to make a function that takes as input a list of numbers and returns a list of 4 lists; the first returned list holds all positive real; the second returned list all negative real; the third ...

I am trying to do the following: ...

I've got a String variable defined as b="4.0 \cdot 10^{-5}", which is clearly written as LaTeX input. The problem is that when I want to obtain the ...

There seems to be an issue with FormObject and line breaks: A simple example to illustrate: ...

I was wondering if the FeynCalc package facilitates quantum field theory integrals of the form $$ \int d^{4} p_{2} d^{4} p_{3} \delta^{(4)}\left(p_{2}+p_{3}+p_{1}\right) p_{2}^{\mu} p_{3 \mu} p_{2}^{\...

VertexColors seems to blend colours unevenly, often with a "stripe" between vertices. Compare: ...

I am trying to work in an HPC cluster. Mathematica works fine and I can export tables that I need. However, I had one interpolated data saved in as a mx file. I ...

The following code tries to plot two unit spheres undergoing transformation of their radius and also a translation in z direction: ...

I am new to Mathematica. I would like to calculate the partial derivative of the product, $\frac{\partial}{\partial x_{j}} y \prod _{i=1}^{n}x_{i}^3=\frac{3}{x_j} y \prod_{i=1}^nx_i^3$, where $1 < ...

WARNING: The code in this post crashes the Front End on my computer, causing all unsaved work to be lost. Be sure to save your work before trying this out! ...

I want to optimize my stock portfolio based on three components: the price of the different stocks the number to buy of each of the stocks the expected return of each stock (after 12 months) For ...

I've been trying to use Mathematica to compute the Fourier coefficient of $$ f(x) = \frac{1}{5 + 4\cos(x)}, $$ which is a $2\pi$ periodic function. Inputting ...

Finding the range of RealAbs[Log[1 + x] - Log[1 - x]] - RealAbs[x - y]/(1 + RealAbs[x - y]) on the set ...

I believe this is a standard problem, but I could not find a solution anywhere. Possibly because I don't know what to look for. I define a subset of some numbers and I want to count how many are less ...

I have a system of 6 1st order ODEs. Since, I don't have access to a Mathematica license yet, I have tried to solve the problem using Maxima but it failed. I have also tried Maple but it takes several ...

I am trying to solve a fairly simple ODE system using NDSolve and am having a problem with the variables. I want to solve the system below: ...

Using the bookmarked conversation mentioned in this answer, I was able to extract the colors (and their parametric positions) of the Mathematica color scheme ...

Mathematica unexpectedly moves a part of the result of the calculation to the left side where I want to display only the unknown variable. Can I prevent this?

I am trying to create a 3D scatter plot, where each point is colored according to a fourth parameter (not corresponding to any of the values on the axes). To do this, I generated a list of colors, ...

This works. It returns "acb". StringForm["a``b", "c"] This doesn't work. ...

Suppose you are given some functional $S$, (with some 'Lagrangian' $L$) $$S[f]=\int_{t_i}^{t_f}L[f(t),f'(t)]dt$$ and you want to find the function $f$ that minimizes it, subject to some boundary ...

The following two plots are not visible when shown togather: ...

Think of multiplictavie group of finite field F[p,n], where p is a prime number and n is a positive integer. The whole elements of F[p,n] can be represented as p^n-p^(n-1) positive integers in the ...

I want to condition the layout of the second page of a form based on inputs from the first page. Somehow RepeatingElement confounds this. Step 1: A not-so-conditional conditional layout function ...

I've got a variable that has two names on it. It is defined as follows: par={b, Subscript[λ, 0]} I would like to ask the user to enter a value of the second ...