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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5
votes
1answer
101 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 ...
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
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 ...
1
vote
0answers
46 views

Program for Handling Huge Primes

I am trying to run a program with really large primes (around the $10^{20}$th prime), but Mathematica seems to only be able to handle around the first $10^{12}$ primes. Is there any software that can ...
1
vote
0answers
50 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 ...
1
vote
0answers
34 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 ...
1
vote
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 ...
1
vote
0answers
42 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 $a_{k,j}$ ...
1
vote
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 ...
1
vote
0answers
219 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 ...
1
vote
0answers
291 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
vote
0answers
104 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 ...
1
vote
0answers
343 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
vote
0answers
227 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
vote
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
0
votes
0answers
31 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 ...
0
votes
0answers
55 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
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 ...
0
votes
0answers
20 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?
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 ...
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 .
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 ...
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
0answers
86 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
votes
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
votes
0answers
16 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
36 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
votes
0answers
82 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
votes
0answers
22 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
29 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
76 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?
0
votes
0answers
67 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
votes
0answers
34 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
19 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
13 views

State-of-Art library or a method for paralell matrix inversion?

Do you have reference to a computer library or a paper regarding a state-of-art method to obtain inverse of a matrix in parallel? Thanks, Mojo.
0
votes
0answers
16 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 ...
0
votes
0answers
18 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 ...
0
votes
0answers
50 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
0answers
13 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
45 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
1k views

Low rank approximation using CVX toolbox in Matlab

I try to use CVX toolbox to do "low rank approximation" work. The code is as follows: ...
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 ...
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
63 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
votes
0answers
149 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
votes
0answers
96 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
votes
0answers
887 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 ...