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

Dear all

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

But, how can we add chebychev acceleration.

Thank you 

Dear all 
I have a finite set, I would like to compute all possible sigma algebra

Using the following code ( thanks to vv), for helping me to use this code:

sigma_algebra_all.mw 

This code give me the sigma algebra if I fix the generator of the sigma algebra, How can I find all possible sigma algebra in the global set {1,2,3}

Thank you

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

Dear all

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

sigma_algebra.mw

thanks