# Tagged Questions

For help with mathematical questions arising from software such as Maple, MATLAB, Mathcad, Pari/GP, R, and the WolframAlpha website, etc. Consider posting questions about Mathematica at the Mathematica StackExchange instead. For GAP, SAGE, and MAGMA, one might use tags (computer-algebra-systems), (...

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### NAUTY algorithm [closed]

NAUTY is a Graph Isomorphism(GI) software developed by Brendan McKay to test isomorphism of Graphs. It provides a practical solution to the Graph Isomorphism problem. It is a program for isomorphism ...
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### Software to calculate an integer sum?

There is a result I want to calculate, but I don't know if there is any software that can help me with this. Anyone knows what could I use to help me? Any answer is much appreciated The formula is ...
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### Graph Software, figures

I'm making my own Calculus notes what (free) software would you recommend to be able to make figures like these ones For instance I would like to be able to represent graphically the ...
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### What's the equation for a rectircle? (Perfect rounded-corner rectangle without stretching on only one dim)

The equation for a rounded square seems to be: $x^4 + y^4 = 1$ You can make the radii smaller by increasing (over the even integers) the exponents in the equation. Here's a picture: Wolfram Alpha ...
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### Having trouble drawing an arc using atan2 and specified range of arc.

I'm writing code. My arc invariant is: $$\theta_0, \theta_1 \in [-2\pi, 2\pi], \\ \theta_1 - \theta_0 \leq 2\pi$$ where $\theta_0$ is the arc beginning angle and $\theta_1$ is the arc end angle. ...
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### Computation of minimal axis-aligned bounding box of an arc segment.

I'm trying to compute the minimal bounding box of an arc segment so when it's time to render it, I only have to examine pixel coordinates within a minimal rectangular region. The code below covers ...
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### Software to find eigenvalues

Is there a software (or website) that is free which can find eigenvalues but with arbitrary constants, say $a,b>0$ being involved?
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### How to solve the following system of partial differential equations?

I have a system of partial differential equations: \begin{align} & u(a,b,c) \frac{\partial y}{\partial c} = \frac{4}{3} ab, \\ & u(a,b,c) \frac{\partial y}{\partial b} = \frac{2}{3} ac + 2 b^2,...
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### Adequate software to plot grids, numerical stencils…

Do you know any software (online or not) easy to understand and appropriate to create this kind of plots? I would like the image to be vectorized, can write subindices, arrows, dots and so on to ...
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### Automatic solver of four-color theorem? [closed]

Does anyone know of an app/online tool to automatically colour any map or image using the 4-colour theorem? (Taking a Black and white image as input).
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### Fibonacci sequence digits

We define the Fibonacci sequence by $F_{n+2}=F_{n+1}+F_{n}$, with $F_0=0$ and $F_1=1$. How to compute the last $30$ digits of $F_{2^{200}}$ for instance? can we use Python?how?
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### Number animation in geogebra?

Is there a way to animate this "triangle" in Geogebra so that the rows are expanding from the top to the bottom?
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### Algebraic geometric software to investigate polynomials with graph theoretical origin?

My teacher uses Singular and Macaulay2 for specific problems in Algebraic geometry but she was unaware which software would be best suited to investigate polynomial basis problems where their origin ...
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### Online visualization tool for planes (spans in linear algebra)

I would like to visualize planes in 3D as I start learning linear algebra, to build a solid foundation. Surprisingly, I have been unable to find an online tool (website/web app) to visualize planes in ...
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### Software to learn limits without l'Hôpital's rule

Can someone point me to good software/website that solves limits step by step without using l'Hôpital? Currently I use Maple and/or WolframAlpha, but both use l'Hôpital's rule and I can't force them ...
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### Is there any maths software to help determine the formulas of given curves?

I am looking for a piece of software if it exists, which would allow me to give 2 points on a graph, (say (0,0) and (100,100) as an example), it would then connect the 2 points with a straight line, ...
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### How to create a matrix in pari/gp [closed]

How does one create a matrix in $\texttt{pari}$? I currently understand how to create a vector: ? vector(6,n,n^2) %1 = [1, 4, 9, 16, 25, 36] I also know how ...
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### The fastest Gröbner basis algorithm available?

for my undergraduate thesis I'm (pseudo) replicating algebraic attack on certain cryptosystem using gröbner basis approach. The heart of original attack was F5/2 algorithm (since the cryptosystem is ...
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### Given number n. Find the n digit numbers. [closed]

For eg; if n = 2, Then the output should be 10,11,...99 // (i.e) 10 to 99 if n = 3, Output: 100,101...999 //note the 3 digit numbers are returned. The range would be 100 to 999. How can i achieve ...
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### Tool to draw graphs when input points are given

I am writing a dissertation and I have a two collections of data from my research which I would like to compare using graphs. I have the values for abscissa and ordinate and I am looking for some sort ...