Tagged Questions

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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Computing Smith Normal Form of $\begin{pmatrix} 1 & c_{12} & c_{13} \\ 0 & 1 & c_{23} \\ 0 & 0 & 1 \\ \end{pmatrix}$

I think this is a simple question, I am looking for a program which computes the smith normal form or rational canonical form of a matrix. Not something fancy, I want just to compute the smith normal ...
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software for the general integer solutions of quadratic diophantine equations

Does anyone know of software (either commercial or free/open) that implements the general algorithm to solve quadratic diophantine equations as shown in this paper by Grunewald and Segal (2004), ...
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Polynomial Regression for Images instead of Data Points

My goal is to calculate the time of evaporation for water when this vase (below) is completely full. I understand that the simplest way would be to experimentally measure the evaporation time, however,...
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Theoretically, can mathematical equations be used to graph any picture imaginable? [duplicate]

I know that quadratic formulas make parabolas, linear makes straight lines and sin, cos and tan make cool curves but after messing around with WolframAlpha and online equation graphing tools I can ...
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Math without pencil and paper

For someone who is physically unable to use a pencil and paper, what would be the best way to do math? In my case, I have only a little movement im my fingers. I can move a computer mouse and press ...
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Matlab - set like datatype?

I'm need to work with Matlab again but it's long ago that I did so the last time. So I need your help (searching for "set" leads only to how to set colors of axis and so...). How can I achieve a set ...
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Working with C++ for GF(2) [closed]

Pardon me if it is off topic.But, is there anyone who could suggest me some basics with how to get started with working with C++ for GF(2)?? I am new in C++.I am learning to working with arrays and ...
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Recommend of English video about math

My mother tongue is not English, but sometime there are some math reports or conference using English .Because my English is poor, I can't understand it well and can't suitably describe my question. ...
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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 $c_i$, ...
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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) ...
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Free programs to draw graphs?

allow me to draw graphs, lines, curves such as parabolas, set intervals with sliding bars etc. I have tried geogebra but it is very limited and is a pain to use. For example, you cannot set a line to ...
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Integration in Maple 16

I need to solve this integral in Maple 16, I've tried various functions such as evalf, solve, ...
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Study of specific Quotients of a $p$-group in MAGMA

In Magma, I wanted to do a program, but since I was getting errors in "basic" commands, I am in trouble. Here I will describe a problem to be done in MAGMA, then its interpretation in MAGMA. I would ...
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Explanation of sums

How would you explain this notation in plain English? I am having issues getting my head around the meaning of the summation symbol. $$x = \frac1n\sum_{i=1}^n x_i\;.$$
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How to load Maple package ??

I have downloaded second version of DGApplications to work with abstract Lie algebra. The file is actually .mla file and it is executale(as when we open it, a prompt ask, "do you want to execute this ...
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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 ...
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A Basic Question E-views

I ask a question about E-views. Is the P-value in the picture less than 0.05 or greater than 0.05? I'm confused because of the presence of the sign '<' in front of 0.10. Please help mee. Thank you.
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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 ...
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Using IEEE floating point standard in math-software. [closed]

For purposes of given math module (that performs some statistical computations) it's sufficient to store reals in IEEE754 floating point format. I'm considering to migrate to SQLLite as persistent ...
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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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Hirota's Bilinear Form

My query is related to conversion of PDE into bilinear form using some transformation. The detailed description about bilinear forms can be seen in book of Yoshimasa Matsuno . The bilinear operator ...
I need a software allows to calculate operation elements of permutation group. For example the following elements operation yields identity permutation $$(1234)(1423) = (1)$$ Sage seems to solve the ...