## 530 Reputation

8 years, 102 days

## Hardy-Littlewood maximal function of ra...

Maple 17

Dear all

I would like to compute Hardy−Littlewood maximal function : we use polar coordinate for a radial function  and then evalaute integral with respect the radius r

Hardy_maximal_function.mw

## transform PDEs using change of variable...

Maple 17

Dear all

I  have a PDE, I would like to substitute the funciton T by another funciton

How transform the old PDE to a new PDE

transfirm_equation_using_change_variable.mw

thank you

## limit at infinity ...

Maple 17

Dear all

I have an equation obtained from partial derivable of some functions, I would like to compute the limit when my variable named Pe goes to infinity.

I hope to get a more appreciate presentation of my code to obtain the limit (  Pe -> + infty)

limit_infinity.mw

All derivative are well compute, but How can I add the limit as Pe goes to infinity

Thank you

## sign of roots of polynomial function...

Maple 17

Dear all

I have a third order equations, I would like to know the sign of its roots, not necessary to find the roots since the equations contains some parameters. All parameters used are positives.

roots.mw

thank you

## system with delay characteristic equatio...

Maple 17

Dear all

have a nice time.

I have a system of nonlinear differential equation with continuous delay.  I tried to find some books that define a strategy to compute the characteristic equation but unfortunattely the most of papers or books give directly the formula without any proof.

I tried with maple, but unfortunattely no solution up to now.

I hope find the strategy how find the characteristic equation of the attached system.

characteristic_equation.mw

thanks

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