## critical point of f(x,y)...

Dear all

I have  a funciton f(x,y)
I compute the critical point, maple gives me three different points, denoted in the code tmin

from these points how can I fix one  one of them that  give me the min( f(x))

code.mw

thank you for any help

## Cauchy criteria Power series...

Dear all

I have a power series, the genral term contains sign(sin(n)),
everything is well defined, but when I apply summation to the general term, i can not see sign(sin(n)), its dropped.. why

and how deduce the the limit to get the radius of convergence

Cauchy_criteria.mw

thank you for any help

## Radius of convergence power series ...

Dear all

I  compute the radius of convergence of power series using maple,

but the code does not give any result

thank you for any help

## Problem with the identity of two variables...

I have a routine which returns a certain result. In the simplest case the result should be p[[1]].

The result is indeed p[[1]]. However, when I ask whether the result is equal to p[[1]], Maple says false.

Why does is not recognize these two things as being equal?

## symmetric group, product of elements...

Dear all

` The aim of this code: to construct a non-abelian group of  odd order

such that the product of its elements not necessary identity element.

symmetric_group.mw

But, the code doesn't display the elements.

Thank you

## What is up with substitution??...

This was very surprising!!

x:=3;
3
g:=x;h:=x^2;
3
9
subs(x=4,g);subs(x=4,h);
4
9

This is inconsistent! After g and h have been assigned values, they do not depend on x anymore, so g should not be turned into 4 by subs

## Experiment in Probability using MAPLE...

Dear all

I have a box contains 3 red balls and 3 white balls, we select one ball three times and we define Z to be  the number of red balls selected.
Since, we selected three times a ball and we count the number of red balls selcted after this experiment, we have
Z(Omega)={0,1,2,3}

Now, How CAN I determine the sigma algebra generated by Z ( which is a random variable).
The following code  calculate the sigma algebra generated by any subset  A subset of global set X ,
I would like to use it, to verify the descripted experiment in probability.

sigma_algebra_random_variable.mw

thank you

## Compute integral of piecewise function...

Dear all

I have a continuous piecewise function, but I can't evaluate its integral

Integral.mw

## piecewise function and integral ...

Dear all
I have a function defined over the closed interval [ x[k], x[k+2] ] and zero elsewhere
I would like to plot this sequence of function and compute an integral.

I need your help to finish the attahced code, something is wrong. I can't  use piecewise funciton in loop and plot all functions in the same graph

piecewise_funciton_and_integral.mw

thanks for your remaks and help

## How to solve this type of equations...

Hi

Warm greetings.

Is it possible to solve the numerical scheme present in the below paper.

Anita Chaturvedi, Kokila Ramesh, and Vatsala G A. (2017). “A MATHEMATICAL APPROACH TO STUDY THE EFFECT OF POLLUTANTS/TOXICANTS IN AQUATIC ENVIRONMENT.” International Journal of Research - Granthaalayah, 5(4) RAST, 33-38.

https://doi.org/10.5281/zenodo.803418

Thank you.

## Gauss seidel with chebychev acceleration ...

Dear all

I know how can I use gauss seidel to solve a linear system.

But, how can we add chebychev acceleration.

Thank you

## Monotone_class_generated_by_set...

Dear all

I have a set of three element, I want to apply each step of the definition of monotone class generated by a set to obtain the element of the monotone class generated by a given set.

The definition and condition of monotone class is added in maple worksheet.

I hope find some steps ( using maple) that will be applied later to other problem.

Monotone_class.mw

thanks

## sigma algebra generated by set using maple...

Dear all

I can I obtain the sigma-algebra generated by a given set.

sigma_algebra.mw

thanks

## Riemann Stieltjes integrals ...

Dear all

Can I compute using maple some Riemann Stieltjes integrals

RSI.mw

Thanks