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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0answers
17 views

Integer operations on long words. [on hold]

Is there mathematical library available to do RSA, discrete log type implementations on long words? For example we should be able to take modulo, multiply, divide, add, subtract, gcd, compute powers, ...
0
votes
0answers
23 views

Software of symbolic computation

In Riemann geometry, there are many complex compute , for example in the picture below.If want to get 2.5.16 it needs about 3 page to compute. And it is easy to mistake because it is complex. But the ...
-1
votes
0answers
6 views

Graph a 3d function in autocad…

This question is related to math software. I use autocad quite a bit to create images for my papers. Suppose I have a drawn an object in the 2D plane, and I want to pull it into the 3rd dimension ...
-1
votes
1answer
19 views

A Basic Question E-views

I ask a question about E-views. Is the P-value in the picture less than 0.05 or greater than 0.05? I'm confused because of the presence of the sign '<' in front of 0.10. Please help mee. Thank you. ...
0
votes
0answers
25 views

Finding best fit curve via 2nd order polynomial

I've set of data points and I need to best fit curve by using $y = a + bx + cx^2$. I know the method of finding $a,b$ and $c$. After getting $a,b,c$; How to use that equation to determine the points ...
0
votes
1answer
60 views

Using IEEE floating point standard in math-software. [closed]

For purposes of given math module (that performs some statistical computations) it's sufficient to store reals in IEEE754 floating point format. I'm considering to migrate to SQLLite as persistent ...
0
votes
0answers
33 views

Curve of all points C for which $|AC|=|BC|$ and $BC \parallel g$ …?

sorry for the title being a little bit weird. The full question is: Let's take two non parallel lines $g$ and $h$ and a fixed(!) point $A \not \in g$. Now take a look at all triangles $ABC$ for ...
1
vote
0answers
17 views

Hirota's Bilinear Form

My query is related to conversion of PDE into bilinear form using some transformation. The detailed description about bilinear forms can be seen in book of Yoshimasa Matsuno . The bilinear operator ...
3
votes
2answers
63 views

math software - permutation group elements operation

I need a software allows to calculate operation elements of permutation group. For example the following elements operation yields identity permutation $$ (1234)(1423) = (1)$$ Sage seems to solve the ...
0
votes
1answer
69 views

Compute Ext with Macaulay2

I want to compute Ext with Macaulay2. I see in the website they write how to do but I can not do. Can anyone help me with an example? For example, let $S=k[x,y,z,t]$. How compute ...
0
votes
0answers
61 views

Adding grid on 3D surface in GeoGebra 5

I have made a file with GeoGebra where I visualize a conical intersection. The standard appearance of the surfaces is a dull, colored surface, like shown in the attached figure. To better get a sense ...
0
votes
1answer
17 views

Computing difficult Fourier series numerically - software recommendation

I need to compute some pretty complex Fourier series of function like this one: $$ f(t) = \quad \begin{cases} 1+e^{-t}, & t\in [0;1)\\ 2, & t \in [1;3) \end{cases} $$ Rewritten to "one-line ...
0
votes
1answer
29 views

My brain doesn't work right now: What's the formula for the $n$th vertex of a discretized sine wave?

So far I have: $$ A \sin(2\pi f ? + \phi) $$ where $f$ is cycles per second, and $\phi$ is in seconds. If I'd like to approximate the sine wave with $N$ points per cycle, and I want to draw $C$ ...
4
votes
0answers
44 views

Are algorithms for elimination of quantifiers over the reals practical?

I wanted to find the semialgebraic set in the $(a_0,a_1,a_2,a_3)$ space that guarantees that there exists at least one real root of the general polynomial equation of degree 4. For that purpose, ...
0
votes
0answers
27 views

No graph shown on Microsoft Mathematics

When I try to graph this formula, $$y=\sum^x_{n=1}[n*\sum^n_{m=1}\sin(\frac{m}{n})]$$, the graph shows nothing. I thought it is possible that I input it in wrongly or the software can't solve this ...
1
vote
1answer
41 views

Is there a good program to download or online for plotting certain functions in 3d?

I am interested in a program that can plot me, without too much trouble shapes in 3d, when I type in the function. For example a elliptical paraboloid and an ellipse of the same time, so I can analyze ...
5
votes
1answer
103 views

Amount of zero in a range

I'm stuck with a calculation. If a person would write down, Everytime he sees a zero and counts +1. 10 counts as 1 zero. 100 counts as 2 zeros. 1000 has 3 zeros. 1005 counts as 2 zeros. Is there ...
0
votes
0answers
21 views

getting points in the Equation

How can I draw a chart for $y=ax^2+bx+c$ in Microsoft Excel and get some points that are applies in the equation?
1
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0answers
21 views

How to perform a quasiconvex optimization

I have a quasiconvex objective function $f:\mathbf{R}^n\rightarrow \mathbf{R}$ which I would like to minimize over a simplex $S\subseteq \mathbf{R}^n$. I have looked pretty hard but have been unable ...
0
votes
1answer
21 views

What is wrong with this code (SCILAB)?

i wrote this on scilab: function q=arrow(x0,y0,z0,a0,r,s) j=1; ...
0
votes
1answer
10 views

Given a line segment from $A$ to $B$, and a scale of your view of space $sx, sy$, how do you preserve width of line?

So I'm using PyQt5 to do 2D rendering for an LED light show creator app. The light shows are graphs where the $Y$-axis is LED brightness level and the $X$-axis is usually time. I have a zoom feature ...
1
vote
1answer
22 views

Graph a function of two variables online, with the output rendered as color

Are there any online utilities to graph a function of two variables online, with the output rendered as color in some way (for example, red to green, black to white, hue, etc...) Wolfram Alpha comes ...
1
vote
1answer
21 views

Program to create graph with modified bessel function

$$e =\frac{1}{x}\frac{I_{1}(2x)}{I_{0}(2x)}$$ $$e =\frac{2}{1+\sqrt{1+x²\frac{8}{3}}}$$ $$e =\frac{1}{\sqrt{x\frac{4}{3}}} ...
0
votes
0answers
19 views

Solve the cubic function (using graphing software)

Let $$f(x) = 2x - x^2$$ and $$g(x) = ax^3 + bx^2 + cx + d$$ where $a , b , c , d$ belong to the set of real numbers, and intersect at two points $P$ & $Q$. These points are also two points of ...
1
vote
2answers
75 views

Is there a site to draw a curve and get the equivalent equation?

I know there are many sites where we can input the equation and get the curve of the function (examples here, here and here). What I want is the inverse: I have an idea of how I want the curve to be, ...
0
votes
0answers
75 views

Running time comparison of algorithms

Which math software or programming language one should use in order to compare run times of two number theoretic algorithms ? I use PARI/GP but I am not sure if this is a right choice .
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votes
1answer
33 views

Can you graph these kinds of equations with any free programs?

http://www.walkingrandomly.com/?p=19 I've been trying to find a way to graph this function without buying Mathematica but I haven't found a way. It might be possible with the free online Wolfram ...
4
votes
1answer
47 views

How can I draw plane distributions in $\mathbb{R}^3$?

I see so many nice pictures of contact structures, integrable plane distributions, etc., in manuscripts and online and I have absolutely zero idea how they're made. For example, the following image ...
1
vote
0answers
40 views

Topology libraries

I have been searching around for a library in some programming language (Java/C++/Haskell/python,etc) that can define topological entities and manipulate them. The only references I've found are to ...
-1
votes
2answers
85 views

If $h$ divides $|G|$, not necessary that $G$ has a subgroup of order $h$

if $h$ divides $\# G$, then it is not necessarily that $G$ has a subgroup of size $h$ which can be related to Lagrange Theorem $[G:H]=\frac{\#G}{\# H}$ in the case when the subgroup exists, ...
1
vote
0answers
49 views

Lagrange theorem demonstrations in GAP with cosets and cardinalities? [duplicate]

The goal of this question is to introduce basic group theory concepts with GAP: examples about alternating groups, cyclic groups and demonstrate the Lagrange theorem $[G:H]=\frac{\#G}{\# H}$. ...
1
vote
2answers
71 views

Is a function in an ideal? Verification by hand and Macaulay 2

Suppose $$f_1=-4x^4y^2z^2+y^6+3z^5,$$ $$f_2=-4x^2y^2z^2+y^6+3z^5,$$ $$f_3=4x^4y^2z^2+y^6+3z^5,$$ $$f_4=4x^2y^2z^2+y^6+3z^5$$ and $$I=\langle xz-y^2,x^3-z^2\rangle\subset\mathbb C[x,y,z].$$ Is ...
0
votes
1answer
30 views

Group theoretic multiplication table analysis software?

Consider a number of different multiplication tables, the results from a graphical parametrisation problem. The goal is to understand which group generates each table or sufficiently close to ...
2
votes
0answers
123 views

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 ...
1
vote
2answers
53 views

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 ...
0
votes
0answers
21 views

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 ...
3
votes
3answers
122 views

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 ...
0
votes
1answer
13 views

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. ...
0
votes
1answer
27 views

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 ...
0
votes
1answer
27 views

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?
0
votes
3answers
42 views

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 ...
1
vote
0answers
27 views

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 ...
3
votes
0answers
58 views

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).
3
votes
1answer
60 views

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?
1
vote
0answers
29 views

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?
2
votes
1answer
44 views

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 ...
2
votes
1answer
79 views

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 ...
0
votes
0answers
63 views

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 ...
0
votes
3answers
70 views

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, ...
1
vote
1answer
37 views

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 ...