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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52 views

Is there a searchable database of mathematical objects that you can search by property?

For example, I could search for functions that are continuous, but that don't have differentiability, and come up with a continuous non-differentiable function. Or a smooth but non-analytical function....
1
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0answers
51 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 ...
1
vote
0answers
280 views

Time series library in Java

I'm looking for a library to do some time series analysis in Java but I can't find anything suitable. I've found plenty of libraries such as Math3 of JSAT but there's much I can you for my problem. As ...
1
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0answers
119 views

Any complex analysis book with programming assignment and exercises?

All: I had studied complex analysis long time ago. Now, I would like to review some material, particularly about Analytic function, Riemann zeta and Analytic function. I have been a software ...
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0answers
28 views

Draw and compare the likelihood using R

The following shows the heart rate (in beats/minute) of a person, measured throughout the day: 73, 75, 84, 76, 93, 79, 85, 80, 76, 78, 80. Assume the data are an iid sample from $\mathrm{N}(\theta,...
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0answers
54 views

In Sage, how to look at orbits of conjugation in GL(2,q). Actually, their image in PGL(2,q)?

I have a matrix $A$ in $\text{GL}(2,q)$ or order $m$. The cyclic group of order $m$ acts upon $\text{GL}(2,q)$ by conjugation powers of $A$ (choose a generator of the cyclic group to act by ...
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0answers
35 views

Solution of equation with special function using maths

I have the following equation with β∈[0,1] and δ∈[0,1] are 2 parameters and $\mu$, $\sigma$ are the mean and standard deviation of a random variable. Is it possible to use software to get the explicit ...
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0answers
68 views

Software tools or libraries for dealing with temporal reasoning (visualization/representation).

Temporal aspect of data with no doubts is an important characteristic for many software systems. I'm interested if there are any tools/frameworks for dealing with temporal data for reasoning on it. I ...
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0answers
43 views

On solving non-linear programming problem and the relevant software

I have a non-linear programming problem, in which all the inequality is linear and only the optimization goal is in a non-linear form. The problem is as following. $x_j$ is the variables and $a_{k,j}$ ...
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0answers
57 views

Issues with CVX package for optimization

I am trying to use the cvx package for optimization. However, I am having some issues with it. I have a variable X which is a matrix but I cannot add $X^{-1}$ in the objective function. What should I ...
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0answers
228 views

Computer Algebra System for probability theory

Is there literally any [ preferably free ] Computer Algebra System that would handle probability theory directly? As for now I am mainly interested in calculating marginal densities out of user-...
1
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0answers
303 views

Programmer understanding academic writings on maths

I would like to know in which order I should learn different areas of maths so I can have a robust overview of all the theory in case I need something for a computer programming problem. So I've ...
1
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0answers
105 views

Concerning The 'Price-Collecting Steiner Tree'

I'm a Master student at the University of Leuven, Belgium. I have to make a report of a case concerning the 'Price-Collecting Steiner Tree'. We have our model and our restrictions. We are just looking ...
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0answers
352 views

Sensitivity analysis on non linear problems

First of all, I would like to apologize if this question does not fit into the "soft" category. I am quite a newbie around here, and maybe I can fail to get the feeling of what exactly is a "soft" ...
1
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0answers
229 views

Coq transparency issues with type class fields

I am having some issues with, I suspect, transparency of fields in type classes. Consider a type class such as ...
1
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0answers
85 views

question about B.N.F

for example i have a code of strings which is efzau and 47 how can i define a grammar, set of terminal symbols and set of non terminal using B.N.F? Thanks
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0answers
13 views

SQP with non linear constraints

I am asked to solve a $SQP$ problem using Matlab, in the instructions for writing the code I am supposed to create two functions one for the function $f$ to minimize and one for the constraints $c_i$, ...
0
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0answers
16 views

Using optim and fitdistr in R to find parameters

I am using R to fit distributions. I have been given the data and have been asked to find the optimised parameters(for lognormal, weibull, exponential and gamma functions) using: 1) fitdistr and 2) ...
0
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0answers
27 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 ...
0
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0answers
29 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
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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 which:...
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0answers
163 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
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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 ...
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0answers
21 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 ...
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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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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 ...
0
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0answers
65 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
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0answers
91 views

What is a good language to represent a mathematical formulas as code

What is a good language to represent a mathematical formulas as code? I am interested in representing my math formulas in various documents so that they can easily implemented in various programming ...
0
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0answers
20 views

Generating random Gaussian fields

I want to generate functions $f: X \to \Bbb R^n$ where $X\subseteq \Bbb [0,1]^m$ is a finite set and $f$ is the restriction of a "nice" (smooth and not too wild) random function $\tilde{f}: [0,1]^m\...
0
votes
0answers
18 views

Primary vs. secondary variable in graphing

In a line graph plotting revenue over time for a company -- Would the date or the dollar amount be considered the "Primary" variable. I am trying to create an intuitive way for someone to create a ...
0
votes
0answers
27 views

Linear algebra package over integers

Is there a fast and friendly tool for matrix-computations over $\Bbb Z$? In particular, I would like to find generators of the solution of a homogenous system of linear equations. This can be done ...
0
votes
0answers
40 views

solving homogeneous equation using r programming language

How to solve for the non trivial solution to the homogeneous system of linear equation.. I tried with solve command but it gives only trivial solutions. eigen(A)$vector[,x] gives answer only for ...
0
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0answers
94 views

Software that uses Cardano's method to solve a cubic?

I am writing an essay for my school. I am think of testing the speed of the Cardano's formula for different types of cubic polynomial. Is there any software or calculator that uses the Cardano's ...
0
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0answers
23 views

Plot zeroes of polyomial in $\mathbb{R}[x,y,z]$ in Linux

I have a polynomial in $\mathbb{R}[x,y,z]$, say $$p_c(x,y,z)=x^2+y^2+z^2-xyz-c.$$ Do you know any simple piece of software to plot the zeroes of this polynomial using Linux? In the past I plotted ...
0
votes
0answers
30 views

Question about Macaulay2

Let $R=\mathbb Q[s^4,{s^3}t,s^{5}t^3,t^4]$. With Macaulay2 how do I find the isomorphism $\text{gr}_{m}(R)=Q[x,y,z,w]/q$, where $q=(-z^2,yz,xz,-y^4+x^3w)$ and $\text{gr}_{m}(R)$ is the associated ...
0
votes
0answers
102 views

Free online graphing utility that supports log log and semi log mode

I usually use desmos for quick plotting of graphs but it doesn't have log log and semi log scale. Is there a free graphing utility that contains this feature?
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0answers
83 views

Finding trends in data with multiple variables, analysis software?

I have a series of many test results (hundreds). They are vibration test results of electronic equipment that has been built the same standard way (same materials, adhesives, structural shape and ...
0
votes
0answers
108 views

Descartes Circle

Having two fixed circles and one varying circle, how can I find the radius of nth circle if the new circle formed acts as varying circle i.e. a and b are radius of two fixed circle. using them and ...
0
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0answers
36 views

Question about the conditional value-at-risk

I have a question about CVaR (Expected Shortfall) An investment who gives a certain amount of cash with a certain probability : A loss of $20$ millions with a probability of $0.0016$ A loss of $11$ ...
0
votes
0answers
21 views

Online Gaussian-elimination solver that produces Latex code of the detailed solution.

I wonder if there exists an online (free) Gaussian-elimination solver that generates a $\LaTeX$ code describing each steps of the detailed solution, i.e. telling which elementary operation is ...
0
votes
0answers
14 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 ...
0
votes
0answers
46 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 ...
0
votes
0answers
74 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 (p....
0
votes
0answers
44 views

How to reduce a graph via decomposition?

Is there a Java / C# library that can be used to reduce a graph via decomposition? Or could someone point me to a good tutorial where I can learn all these? E.g.
0
votes
0answers
66 views

Computer-aided study of elementary geometry

As a beginning student of elementary (euclidean plane) geometry, so far, I have gotten the impression that there are two major approaches to geometries: naive vs axiomatic. Being a humanities student ...
0
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0answers
150 views

Applet to find least-crossings drawing for an input graph

Is there a convenient online applet that allows me to draw a graph, after which it outputs a plane drawing of an isomorphic graph that has (approximately) the least number of crossings among all ...
0
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0answers
97 views

Simple Application to model matrix transformation of basic geometric shapes

I've been searching the internet for a simple, free, application that will allow me to experiment with matrix transformations on a 2D and/or 3D graph of geometric shapes. For example, I'd like to ...
0
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0answers
920 views

Generating an equation from an image I have

I am not exactly sure if this question belongs here but I could not think of a better place to ask. So I recently discovered that various people on the internet have created equations for rather ...
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votes
0answers
22 views

Generating elements of a group using a software

I am studying Heisenberg Group $H(Z_p)$. Now I want to start by generating the elements of when $p= 1, 2, 3,...$ and so on. But when p increases, the elements are too many. I just want to ask if I ...