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 tag computer-algebra-systems.

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1answer
54 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
26 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 ...
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0answers
17 views

special formatting for mathtype [on hold]

suppose we want to have equations numbering in this way using math type, how could we achieve that? a=bx (1) c=ed (2.a) g=ls (2.b) g=ao (3) Thank you:D
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votes
2answers
38 views

Is there any good software to plot trigonometry graph?

I want to plot trigonometry graph like sine function, cosine function, etc. (degrees, not radians) but I don't find anyway to make it in my computer. I like graph produced by WolframAlpha, but it ...
-2
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0answers
28 views

Programming language for function analysis

what would you suggest as a programming language for working with functions and graphs. I need them to work with complex piecewise functions. P.S it is okay, if you suggest any software.
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0answers
124 views

Is there handwriting-like rendering of mathjax formulas [closed]

We all know to write formulas (or expressions) like this $$\forall a \in \mathbb R \exists L \in \mathbb R \lim_{x \to a^+}f(x) = L$$ or $$ \Delta = ...
1
vote
2answers
40 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 ...
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2answers
92 views

online software to draw generic graphics for calculus and analysis?

could you mention any software in which I could design images like this.
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0answers
74 views
+50

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 ...
-2
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0answers
26 views

How to express this equation in Grapher, Mac? [closed]

How to express this equation in Grapher, Machintosh \[h=[1,2,3,4,5,6,\cdots,N]\] \[F(\theta)=h(N)+2\sum_{l=1}^{N-1}h(N-l)\cos(\theta l)\] Also, I want to integrate \[\int(F(\theta))^2d\theta\] ...
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0answers
23 views

why do I get imaginary number using Discrete Fourier transform?

I am looking for an approximation for Poisson binomial distribution: The Poisson binomial distribution is the discrete probability distribution of a sum of n independent Bernoulli trials. you can ...
1
vote
1answer
31 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 ...
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0answers
15 views

How to solve a semilinear PDE numerically using COMSOL MULTIPHYSICS

I want to solve a semilinear parabolic PDE given by, $u(T,x)=0$, while on $(t,x)\in[0,T)\times(0,1)$, \begin{eqnarray} \frac{\partial u}{\partial t} +a(x)\frac{\partial^2u}{\partial ...
1
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0answers
19 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 $\max_{i,j}|x_{i,j}|$, ...
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votes
0answers
32 views

Implementing odd and even functions into PARI/GP

My elliptic curve is $y^2=x^3-3267x+45630$ and I have the following code to generate $DD$ mod 1789 where DD is the sqrt(denominator) of the x-coordinate. ...
0
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0answers
19 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} < ...
3
votes
3answers
281 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 ...
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1answer
21 views

How to truncate decimal points especially .000000… on floats in an expression in Sage?

I have typed out the following block of code in LaTex/SageTex. ...
4
votes
4answers
131 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 ...
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votes
2answers
32 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
0answers
12 views

models to experiment with game theory?

I want to learn game theory from a practical point of view. Does anyone know if there exist programs that illustrates the utility of game theory? Or books that contains MATLAB simulation of games? ...
0
votes
2answers
54 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
58 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 ...
2
votes
0answers
30 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 ...
1
vote
4answers
84 views

Best program for 3D plotting

I've hit a roadblock with pgfplots where it has difficulty plotting multiple functions at the same time in 3D. As it states in the manual on page 114, "it cannot combine different \addplot commands, ...
1
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4answers
115 views

free Math software and where to get it [closed]

I am a math enthusiast. I would like to know what kind of math software are available to assist me in learning mathematics. I am now self-studying number theory (w/ assistance from you guys), but I ...
0
votes
0answers
33 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
30 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 ...
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0answers
21 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
150 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 ...
1
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0answers
53 views

Any online Legendre polynomial calculator?

Do you know if there is any online calculator to calculate Legendre polynomial's coefficients? And combined with a graphing utility would also be desirable. Thank you for your time and help.
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votes
2answers
39 views

Math and geometry software to create instructional videos

I am looking into starting an amateur project for online tutoring. I need a math/geometry program that I can use to create shapes, graph functions, and create animation. I know of many types of ...
1
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0answers
66 views

Are there any programs like family echo that I can use to map mathematics?

Family echo is an online program that allows one to make a family tree, if nothing is clicked it shows most of the family tree as it is, but if one clicks a name one can see clearly all the ancestors ...
2
votes
2answers
79 views

Request for apps for Mathematical Drawing [duplicate]

I have been for long looking for some software apps which can help me draw various mathematical and geometrical figures and drawings.Can someone please tell me something about these which will run on ...
1
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2answers
86 views

Graph Theory Software with simple GUI

To the best of my knowledge I cannot find, on this site, any graph theory program resources. I am looking for a program where I can draw nodes and edges and most importantly drag and drop vertices ...
1
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1answer
30 views

Solving linear functions with constraints.

I have a table of data, for maximum available items in a given time period. With a constraint on how many of each items I can take in total. When I have taken the allowed amount of an item I can ...
1
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1answer
125 views

What are good programs for writing expressions?

By writing expressions, I mean intermediate expressions to "show your work," such as the ones in the below image. LaTex would seem like overkill for such problems.
1
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1answer
31 views

How to return the monomials in a polynomial in Maple?

Are there some function $f$ which returns the monomials in a Laurent polynomial? For example, $f(a_1^{-1}+3b_{2,1})=[a_1^{-1}, 3b_{2,1}]$. Thank you very much.
2
votes
1answer
40 views

Question about GIMPS (Great Internet Mersenne Prime Search)

Not sure if this is really an adequate question here, but I found no other place to turn. I'll understand if this gets closed. I recently learned about the GIMPS project, and installed it on my ...
0
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2answers
23 views

Return factors of a monomial in Maple.

Let $$ m = Y_{{1,0}}{Y_{{1,2}}}^{2}Y_{{2,5}}Y_{{1,8}}. $$ Using the function op in Maple, we have $op(m) = Y[1, 0], Y[1, 2]^2, Y[2, 5], Y[1, 8]$. But $op(Y[1,0])=1,0$ and $op(Y[1,0]^2)=Y[1,0],2$. Are ...
1
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1answer
62 views

Math software to calculate in different rings.

I was doing computational experiment by using rings of polynomial like this let $f(x)=x^6+x\in\mathbb{Z_n[x]}$ for any given $n$. Is there any software which help me to calculate $f(a)$ where ...
1
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0answers
25 views

Program for playing around with aperiodic tilings

I know this is technically a software question, but I figure the mathematicians here would know more about it: I'm looking for software to play around with different "paintings" (different patterns ...
1
vote
1answer
88 views

How to show result in terms of $\pi$ in Mathcad?

Is it possible to display a result in Mathcad as a function of $\pi$? I'm studying physics and I need to show exact results at the exams. I know I can set Mathcad to give me the result in ...
2
votes
1answer
60 views

How to implement a group action in Sage ( for educational purposes )?

Let S= {"A","B","C","D"} and S4= SymmetricGroup(4). I want to create a table of the action S4 x S -> S which standardly permutes the letters in the set. The table should look like: ...
0
votes
0answers
11 views

Engineering - Appropriate concrete grade for supporting structure under wind loading?

I have a concrete tower/pier/supporting structure for a bridge. As part of the design, I need to consider SLS checks for wind loading on the tower before the deck, cables etc are built, so ...
1
vote
1answer
94 views

Behaviour of the sequence $u_n = \frac{\sqrt{n}}{4^n}\binom{2n}{n}$

Let $n\in \mathbb{N}^{*}$, let ${\displaystyle u_{n}={2n \choose n}\sqrt{n}\ 4^{-n}}$ Show that $(u_{n})_{n}$ is convergent and ${l.e^{-\frac{1}{8n}}<u_{n}<l}$ The original text i'm ...
1
vote
1answer
37 views

Semantic tableau software

Is it possible to find software to perform semantic tableaus (as described in http://en.wikipedia.org/wiki/Method_of_analytic_tableaux) automatically? Right now I am proofing it by hand.
0
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0answers
42 views

QQ-Plot on R for censored data.

I have plotted a qq-plot on R for a data set which is assigned the value -0.25 for any values below -0.25. However on the qq plot it plots all the -0.25 points, I have been told there is a way to plot ...
2
votes
1answer
91 views

Solving equation with integer matrices as unknowns

I am currently working on a problem, where I need to know for square integer matrices, $A$ and $B$, whether or not there exists square integer matrices, $X$ and $Y$, such that $X(A-I)Y=B-I$, where $I$ ...
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votes
2answers
46 views

Can Apple's Grapher evaluate a function?

I just noticed that Grapher fails to evaluate a function at a constant. In the image, the graph of y = c should of course be a horizontal line. Is there a way to fix or work around it? This seems like ...