For help with mathematical questions arising from software such as Maple, MATLAB, Mathcad, Pari/GP, R, and so on. Consider posting questions about Mathematica and WolframAlpha onto Mathematica StackExchange instead. For GAP, SAGE, and MAGMA, use computer-algebra-systems.

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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 ...
-9
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0answers
34 views

fixed point iteration code [on hold]

So as I was working out my math with the following equations using the fixed point iteration, I stumbled to wonder if one can ever write a C program, MATLAB (or the likes) for such math. So my ...
1
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1answer
57 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 ...
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0answers
25 views

modelling equation problem [closed]

Modelling Link above, I have to find how they concluded their equations at least. (it comes from here, we put it instead of that etc.) As shown in image, it was found equation (3) from (2). I need ...
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1answer
24 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.
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0answers
23 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
50 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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0answers
22 views

The best advanced maths library in java

Math class in java is fine for small and basic mathematical operations like ; Math.random(); But is there any library from which i solve more complex ...
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2answers
28 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 ...
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2answers
37 views

How to make your own supply/demand graphs on a computer?

This is an econ question but I think you guys might have the solution. I am writing an economics paper and I need to show, in my theory, shifts in the supply and demand that I predict. I don't have ...
2
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0answers
46 views

Finding newforms with Sage

I am new to Sage and modular forms. I have some conceptual questions. When I write sage: S = CuspForms(Gamma0(55),2,prec=14) sage: S.new_subspace().basis() ...
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1answer
25 views

Is there a way to change default order of series in Maple?

The default order when expanding in the software Maple is 6 (six!!!). This is very awkward and annoying because one rarely need even the second (non-trivial) order. In any case, is there a way to ...
3
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0answers
21 views

Software for Braid Groups

I am looking for software/online tool that works on Braid Groups. I am aware that there are resources that allows you to draw braids by imputing generators or detect whether two braids are equivalent ...
2
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0answers
50 views

Software to solve basic set equations (in algebra of sets)?

What symbolic math software is able to solve basic set equations? E.g. $X \setminus A = C \setminus X $, for $X$
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0answers
55 views

Algorithm to numerically solve this system of three polynomial equations of degree $6$ [closed]

Mathematica Nsolve gave all $6$ solutions without an initial guess, whereas sympy Nsolve gave one solution closest to the ...
0
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0answers
36 views

a math-software that can compute analytic spread

I want to compute "analytic spread" . So I need a math-software that can compute it. can anyone help please? Here is the definition:
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1answer
29 views

Graphing inequalities on a number line

What software or websites for graphing inequalities on a real number line?
2
votes
1answer
66 views

Finding the least prime of the form $6^{6^6}+k$

I try to find the least prime number of the form $6^{6^6}+k$. I sieved out the candidates by trial division upto $10^6$, but there are still many candidates left upto $k=10000$ How can I further ...
1
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1answer
27 views

Scaling axis on Mathematica's plots

I'm trying to get the plot below only I want the ratio y:x to be 1:1 instead of 2:1. I want the ellipse to look tall and slim instead of short and fat. Here's the code line if you want to copy and ...
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0answers
7 views

Form Poset from (Non-zeta) Matrix

I have a matrix (well, really a table) of values that are the results of various indicator systems. Naturally, each system is slightly discordant, so no one true ranking exists. I'm looking to form ...
1
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2answers
94 views

Tools for understanding Abstract Mathematics

I want to explore the concepts of Groups, Rings and Fields for practical application. Are there beginner-friendly tools available to simplify, accelerate, verify the understanding of concepts in ...
1
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1answer
56 views

Implicit plot3d in Sage Math

I am currently trying out using the math software Sage. I am currently in a Calculus III class at my university so I was hoping to be able to leverage its 3D graphing capabilities. In one particular ...
1
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1answer
24 views

Mathcad doesn't calculate an expresion

could anyone help how to force Mathcad to calculate an expression. After some steps I got such result: http://i.imgur.com/7FtprAI.png but how can I get the result of such expression? Thank you!
3
votes
3answers
172 views

Recommendations for Commutative Algebra Software?

I'd like a software that I can use to work with commutative algebra, specifically to figure out S-Polynomials, Buchberger's Algorithm, etc. I have Mathematica; if anyone could refer me to a package, ...
0
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2answers
20 views

Paramertized ellipses

I have $a^2 = (4x-8)^2 + 4y^2$ and $b^2=(4x+8)^2 + 4y^2$ which I switch between every $t=\frac{n\pi}2$ How do I draw this touching the origin, and moving outwards, noting that ...
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0answers
36 views

Drawing Phase planes with one input, rather than long scripting

What software can be used to draw phase planes easily? I want to input some $\begin{pmatrix}x_1 \\ x_2\end{pmatrix}=$blahblah, and have it plotted with or without initial conditions. Is there any ...
0
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1answer
18 views

Converting to Power of Ten Representaion

For very large calculations Wolfram Alpha offers a variety of different representations of the number. One of these is the number written in the form $10^{10^n}$, where $n$ is usually some long ...
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0answers
5 views

Statics of a Rigid Body

The I-beam A-B shown below is supported by a cable at B and a pin at A. The cable is inclined at an angle, θ = 23° to the longitudinal axis of the beam. The beam supports a load, m, of 8 kN at a ...
0
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1answer
29 views

Is there free software that can be used to generate a chain rule tree graph?

I'm in multivariate calculus and we just finished up the chain rule. One of the methods for solving this is to produce a tree graph and traverse it. An example would be this tree graph taken from my ...
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4answers
43 views

Recommendation for free graph plotter that can produce beautiful graphs

Can anyone please recommend a good free graph plotter that I can download. I am looking for a program that can produce neat looking graphs with all the axes, grids and that can plot many different ...
0
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2answers
88 views

How I can calculate this number

How I can calculate exactly this number: $$ \frac{(\sqrt{3}+2)^{2^{333111366}}+1}{(2^{333111367}-1)(\sqrt{3}+2)^{2^{333111365}}} $$ Several softwares do not support this number.
6
votes
4answers
187 views

Software, techniques and tricks of experimental mathematics to conjecture possible closed forms

It often happens that people conjecture possible closed forms of integrals, series, and so on starting from a numerical value calculated to very high precision. What are the techniques, tricks, ...
1
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1answer
68 views

Mathematica Question regarding NSolve

I'm trying to solve for 2-cycles for the equation $$x=xe^{r[1-x]}$$ using Mathematica. I've tried using NSolve, FindRoot, and Solve. When I use NSolve I input it as $$\textrm{NSolve}[xe^{r[1 - xe^{r[1 ...
2
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1answer
64 views

How we can drow a Blaschke $3$ ellipse?

Today I read the article Ellipses and Finite Blaschke Products (www.jstor.org/stable/3072367 Blaschke ellipses) by Ulrich Daepp, Pamela Gorkin, and Raymond Mortini. In there they have proved very nice ...
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0answers
41 views

Modified Lucas-Lehmer Test

Conjecture (Modified LL) Let $M_p=2^p-1$ such that $p$ is odd prime and $p\equiv 5 \pmod{6}$ . Let $S_i=S_{i-1}^8-8\cdot S_{i-1}^6+20\cdot S_{i-1}^4-16 \cdot S_{i-1}^2+2$ with $S_0=4$ , then $M_p$ ...
0
votes
3answers
92 views

Plot the graph of a discontinuous function of two variables using Maple

I want to plot the level curve of $xyz = 1$; According to wolfram alpha the plot should look like this; But instead I end up with; Here's my Maple code. I'm sure it's because the function is ...
0
votes
1answer
31 views

Where can I find a binary calculator that can do exponentiations, roots and logarithms?

I've searched on Google, but all I found was binary calculators that can do additions, subtractions, multiplications and divisions, nothing else.
2
votes
0answers
42 views

Highly Customizable Graphing Software for Algorithmic Art

For my local hacker/maker space I want to do some etched copper plates that have stylized algorithmic functions on them. If you've seen etched PCB circuits then you're familiar with what I'm talking ...
2
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0answers
60 views

Math software for plotting phase portraits

I'm looking for math software which is possible to plot phase portraits for ODE and systems of differential equations. Is there a software which can create not only simple 2D phase portrait plots but ...
5
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1answer
137 views

Efficient free alternative to *Mathematica*

I am searching for a free alternative to Mathematica. By efficient, I mean that it should have every (or at least almost every) function that you can find in Mathematica, including for example Number ...
1
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1answer
225 views

Is there software I can use to draw this graph?

So, I have this particular graph to consider. It has the vertex set $\{1,...,17\}$ and edge set $\{(i,j)|i+j ~\mbox{is prime}\}$. Define a cost function $c:E(G)\mapsto \mathbb{R}$ by setting ...
2
votes
1answer
65 views

Software for math sketching

Usually when you're writing in LaTeX you want some pretty illustrations. Right now for geometry figures I use GeoGebra, which is easy enough; but I usually see better figures on other papers. Plus, ...
0
votes
1answer
43 views

Exponential least squares biased to small y?

I'm working on fitting an exponential decay curve to a data set. While searching for techniques I found Wolfram's page describing how to easily accomplish it by taking the natural log of the ...
0
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2answers
73 views

Defining a probability density function in R (software), and sampling from it

I'm asked to generate a random sample from a logistic distribution with the PDF, $$f(x)=\frac{e^{-x}}{(1+e^{-x})^2}$$ without using the function rlogis(...) So I ...
1
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3answers
191 views

Runge Kutta 8(5,3)

This is actually three small very related questions about Runge Kutta methods. 1) I have programmed a RK 7(8) method also RK 4(5). At the beginning I was assuming that the RK 7(8) uses two ...
0
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1answer
25 views

Mathcad simplify results using cnsg instead of 1

How can I prevent Mathcad from adding csgn to my siplification? Sample: (x-1)/((x-1)^2)1/2 simplify -> csgn(x-1) Image from Mathcad
0
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0answers
58 views

Calculations in McLain groups

Is there any program in GAP or other softwares doing calculations in McLain groups and finding subgroups etc. For the McLain groups see Derek Robinson's book: A course in the theory of groups, p347 ...
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votes
1answer
26 views

Is there a document creator that allows for basic entry? [closed]

I am really not sure how to word this... I'm wondering whether there is a program that allows for document writing, and works in a similar way to the Equation Editor in MS Word? (obviously without ...
1
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1answer
76 views

Formula rewriting software

I would like to have a program that rewrites formula's for me. What I would like a software where I can imput some formulas, constraints, and so on, and then the program outputs the formulas that ...
1
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1answer
61 views

What software and hardware can you use to write math and take notes?

I'm trying to basically replace paper. I want to be able to write things and draw things out as easily as I can on paper. I bought the Wacom Intuos tablet on Amazon but ended up returning because it ...