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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2
votes
1answer
127 views

How can we draw a Blaschke $3$ ellipse?

Today I read the article Ellipses and Finite Blaschke Products by Ulrich Daepp, Pamela Gorkin, and Raymond Mortini. In there they have proved very nice geometric results about per-images of Blaschke ...
0
votes
0answers
10 views

Tools to Find Limits of Function Outputs from Functions and Input Limits

I've got a complicated (to me) series of functions and I need to determine the limits of the outputs based on various assumptions about the inputs. I took a quick look at SymPy, but it does not seem ...
2
votes
2answers
62 views

Is There Free Software that Uses the Same Commands Math Exchange Uses to Write Math Expressions?

Is there free downloadable software that allows me to write mathematical expressions with the same commands that are used to create them in math stack exchange? I tried texnic center, but their ...
0
votes
1answer
90 views

Mathcad simplifies results using $\textrm{csgn}$ instead of $1$

How can I prevent Mathcad from adding $\textrm{csgn}$ to my simplification? Sample: (x-1)/((x-1)^2)1/2 simplify -> csgn(x-1) Image from Mathcad
1
vote
1answer
58 views

P-value, T-test, R.

How does language R determine p-value? Suppose that we have a piece of code: x <- c (1,2,3,4) t.test (x) And result: ...
2
votes
1answer
63 views

Any mathematical software to verify no unique products.

Let $D^3= D \times D \times D$ where $D = D_\infty$ where we see $D$ as the group generated by $\mathbb{Z}$ and element $0^*$ of order $2$ such that $0^*n0^*=-n$ for all $n \in \mathbb{Z}$. Letting ...
5
votes
5answers
5k views

Can One use mathematica or maple online?

Is it possible to use some of these algebra packages online ? I have some matrices that I would like to know the characteristic polynomial of. Where could I send them to get a nicely factorised answer ...
0
votes
0answers
13 views

Clarification: Deterministic vs Pseudo- Random Number Generation

I came across the readme for a program stating that it was capable of "Simulation tooling: discrete event simulation and deterministic random number generation." I've never heard of this term used ...
2
votes
1answer
86 views

Practical applications of computer algebra systems

(Sorry if this is not the correct place for the question) Are there practical applications of symbolic computation systems like Mathematica, Sage, Maxima and the like in software development? To ...
2
votes
1answer
44 views

Is there any Software package to confirm correctness of your derivation steps?

Suppose I made a very complicated (not necessarily difficult) derivations in which it is very likely for anyone to make some silly mistakes, e.g., incorrect sign, overlooking a term, and so on. I ...
9
votes
7answers
532 views

Cayley table group visualization

how can I make graphics like this? random colors. I got a script in GAP that prints rows of numbers but I want it colored just random colors ...
19
votes
8answers
38k views

Recommended (free) software to plot points in 3d

I am looking for (preferably free) software to: 1) plot 3d points read from a file. A scatter plot would be fine. 2) Optionally color the points by a property - also read from the file It would be ...
-2
votes
1answer
75 views

What is the Best Mathematics editing tool? [closed]

I need a text editor for mathematics where I can easily type mathematical equations and different symbols as easily and with speed as I type plain text... I have checked some tools but they are ...
21
votes
5answers
4k views

Online MathJaX editor

I suspect this might easily be a clone question, it seems impossible that nobobdy would've asked this before, but my searches seem to return nothing. I've grown very used to the MathJaX input here. ...
4
votes
4answers
151 views

Finding a Function That Approaches Another Function

One of my math professors gave me the following challenge. It isn't graded, it's just for fun. Consider the function: \begin{equation*} f_n(x)=x+3^3x^3+5^3x^5+...+(2n-1)^3x^{2n-1},~x \in (0, 1). ...
10
votes
2answers
376 views

Math-related open source software to contribute to

I'm interested in finding a math-related open source project that I can contribute to. I've studied maths and stats at undergraduate level, but I'm a professional software developer and I'll have some ...
1
vote
0answers
50 views

rotation matrix - satellite control system

I am in charge with developping a satellie control system. There is something that I either understood incorrectly or either is wrong in the explanation. I am checking if I am able to get the values ...
6
votes
2answers
336 views

What are well-known weaknesses of CAS/math software?

I'm starting to become more functional in Mathcad, so I wanted to take the opportunity to look into known drawbacks, mathematically speaking, of CAS/computer math systems. For instance, one of the ...
0
votes
3answers
49 views

Mathematics software to carry out iterations of Newton-Raphson method?

I made this post a while ago, and I understand everything now. The problem is that I'm not sure what mathematics software I can use to generate the iterates like the user Amzoti did. His account has ...
15
votes
7answers
544 views

Looking for Open Source Math Software with Poor Documentation

I'm a techie who is looking to transition to technical writing as a career. It's been suggested that I produce documentation for an Open Source project to demonstrate my ability to do technical ...
3
votes
1answer
68 views
0
votes
0answers
37 views

Looking for math software

I'm looking for a software or a tutorial on how to write my own math software which will solve equations from the value i input. As an example: I will program the following equations into the ...
0
votes
2answers
128 views

online software to draw generic graphics for calculus and analysis?

could you mention any software in which I could design images like this.
6
votes
1answer
146 views

Best program for creating educational math animations?

I'm looking for recommendations on what program to use for creating mathematical animations. These animations will be used in creating educational videos for high school math -- Trigonometry first, ...
4
votes
3answers
232 views

OCR: some App to calculate the derivative on a line graph with iPhone/iPad?

Problem I have a set of points like the ones shown on the right hand side of the image. So for each 'Ships Head' there is a corresponding value for 'Deviation'. In this example we can treat west ...
0
votes
0answers
11 views

R^2 in Generalized Linear Models

I am trying to model relationship between predictors and explained variable in R using glm() function. I've found quite good model that gives me satisfactory results. Is there some way how to ...
1
vote
1answer
71 views

Writing equations without latex (for labelling, classification, structure analysis and rendering according to mathematical meaning)

I'm searching a solution to write equations other than (but compatible with) latex. While latex is excellent for math rendering, it is not suited to describe the structure or meaning of the equations. ...
1
vote
1answer
186 views

Finding a root by bisection method in Excel

Working on a maths assignment and we're trying to use Excel for a bisection method. $$\frac12 e^{x/2}+\frac{1}{2x}-\frac32=0$$ Here is a pic, I can't get the formula to work with the exponent. This ...
0
votes
1answer
3k views

software to draw geometry 2D, 3D

I am looking for a software to sketch moving figures as this one. Thanks.
0
votes
2answers
904 views

Software to draw easily sectors with angle on it

I want to draw a sector with the angle on it. I have tried several tools but didn't find any easy way of doing it.
7
votes
1answer
999 views

How do I plot multi case function in wolfram or geogebra?

How do I plot the following multi case function in wolfram or geogebra? $$ \begin{eqnarray*} f(x) = \begin{cases} 1, &\text{if }x \text{ is an integer}, \\ 0, &\text{if }x \text{ is ...
6
votes
3answers
931 views

Software to render formulas to ASCII art

I guess all computer algebra systems have command line interfaces which render formula as 2D monospace "ascii art". But the only standalone tool to render TeX to 2D I know is ...
1
vote
2answers
84 views

What is a good free software to draw complicated Venn diagrams?

The important feature I want is this : I would like to draw two sets as say ovals in solid line but I would like to have the border line in some neighborhood of their two intersection points to be ...
1
vote
0answers
136 views

Cabri 3D - Rotating a triangle

I'm given the exercise, in Cabri 3D, to rotate the triangle T around the axis AB and lead it via the triangle To to the triangle T'. I tried to rotate the triangle T around a fixed point and then ...
1
vote
1answer
56 views

Finding the function of a parabolic curve between two tangents

Alright folks, first question here so let me make the situation and background clear. I'm attempting to start studying for aerospace engineering, so I'm working on improving on my math skills as we ...
1
vote
3answers
149 views

What softwares are convenient to draw a quiver?

I would like to draw some quivers in a mathematical paper. What softwares are convenient to draw a quiver? Thank you very much.
4
votes
4answers
171 views

Why can you not omit the '*' sign for multiplication in Sage, Matlab, and other mathematical software?

Question I have some experience with Sage and Matlab. Both mathematical software packages require you to have the '*' sign when multiplying symbolic variables with integers. For example, in Matlab ...
1
vote
0answers
21 views

On Procedure Constrained Matrix Factorization

Given rank $r$ $A\in\Bbb R^{n\times m}$, is there a procedure to find $XY=A$ such that $X\in\Bbb R^{n\times r}$, $Y\in\Bbb R^{r\times m}$ with property that $\max_{i,j}|x_{i,j}|$, ...
3
votes
3answers
312 views

A bug with the WolframAlpha computational search engine?

I think I may have discovered a bug with WolframAlpha. So I was trying to determine all $x$ such that $$\sum_{i=0}^{5}{x^{-i}} < \frac{13}{12}.$$ WolframAlpha spit out $x > 13$ (see this ...
0
votes
0answers
22 views

Computational verification request

Let $I(x) = \sigma(x)/x$ be the abundancy index of $x$. Note that $\sigma$ is the classical sum-of-divisors function. Previously, I computed for $u$ in the inequality $$\sqrt{3} < ...
1
vote
1answer
30 views
0
votes
2answers
33 views

How to start using R (or free alternatives)?

How to start using software R to make regression analysis and forecasting? Are there any other free software to work with this kind of analysis?
0
votes
2answers
57 views

what is the proof for matrix multiplication being commutative

I understand that if we have matrix $A$ and $B$ then $A \cdot B \neq B \cdot A$ as when you multiply the matrices in a different order, then their cells will shift in another form, thus making their ...
2
votes
1answer
65 views

Help in making an animated locus is needed [closed]

I have triangular cardboard ABC, right angled at C. As shown in the attached, initially, A and B are resting on the x- and y- axes respectively. A is then allowed to slide along the x-axis with B ...
29
votes
7answers
1k views

What is your favorite online graphing tool?

I'm looking for a nice, quick online graphing tool. The ability to link to, or embed the output would be handy, too.
0
votes
0answers
44 views

Geometry software

I have some computer graphics programming experience, not so long ago, I understood that I haven't grwat experience in math and there is some problem. So, im learning math and coding at the same time. ...
0
votes
0answers
35 views

How do I put this differential equation into mathcad 11

$$\frac{d^2y}{dt^2}+\frac{dy}{dt}+2y(t)=sin(t)+2e^{-2t}-2$$ I want to put this into mathcad, and then solve it numerically. I would also like to plot the solution. Sorry for the link, wasn't sure ...
1
vote
0answers
38 views

Lower bounds on possible integer relations from the PSLQ algorithm

For the equation: $$ \sum_{i=1}^na_ix_i=0 $$ where all $x_i$ are real numbers and all $a_i$ are integers, the PSLQ algorithm can either find an integer relation or give lower bounds on the norm of ...
2
votes
1answer
188 views

Software for drawing braid-related graphs

I am looking for a (preferably free) software that can draw braid-related graphs, such as and (Quoted from A Study of Braids By Kunio Murasugi, B. Kurpita) I have seen this question, but the ...
16
votes
3answers
7k views

How to cite preprints from arXiv?

Obviously when writing a math research paper it is good to cite one's references. However, with the advent of arXiv, oftentimes a paper is only available on arXiv while is awaits the long process of ...