Hi every body.

I want to solve a differential equation:

ode=D(r(θ),θ).....

I have the initial conditions:

e=10^(-20)

r(e)=A where A is parameter.
r'(e)=0

sol:=dsolve({ode,r(e)=A,D(r)(e)=0},parameter=[A],numeric)

and:

All in the file.

#@#

Ode-Problem.mw

hi every one

please see attached file blew and help me for dsolve set equations.i dont know aboue errors with in

thanks

equation.mw

When solving ODE with dsolve, I don't want to use "_C1" as the name of constant, I want to specify by myself, how can I do?

Take for instance the signal [1,0,-3,2,1,0,1,2] (considered in Wavelets for Kids, Vidakivic & Mueler, AMS, 1991).

I want to anlalyse it down to the level zero with Haar wavelets. It seems that MAPLE's commnad only applies once.

Hi !

I am trying to solve a pde with initial/boundary conditions, in the numeric mode. It works very well when I provide 3 numerical conditions : 1 initial condition (uniform distribution at first), and two boundary conditions.

Now I want to switch the initial condition to a function of r. It's a polynome I obtained after interpolation of another result. I tested it and the function interp20(r) works. But the pdsolve doesn't seem to evaluate the function, when it comes to start the procedure and pdsolve doesn't return a module as it should, although it doesn't send any message error.

You can see the code following, with the error messages I get.

Is it strictly impossible to use a function as an initial condition ?
Is it just a problem I could solve by converting the function or its result to something else ?
Is float the right type of input ? For example, if I write a:=283.15, is it a float ?
Have you already had similar problems ? How did you solve them ? Where could I find working code examples on this ?
Could I solve this problem with non-uniform initial condition with another Maple function ?

Then you very much for your help !

Hello 

Does any one have the package DESOLV not deslove , I need it with its help file.

Carl Love 9260

hi.i have problem for dsolve equation.please help me again

thanks alotequation.mw

Hi everybody.

In the following attached file, I have created 3 matrices with 13*13 and 13*6 dimensions and their components are numeric. I closed Maple and ran it again. Surprisingly, when I try to browse the matrices again, I encounter with this problem " empty RTable structure" while I imported the components, manually.

Thanks in advance for your answers.

Ho.mw

I want to solve these two differential equations. I have the initial conditions:
x(0)=0
y(0)=0
x'(0)=5.7
t'(0)=8.1
What am I doing wrong?

How can I do a color inversion on a jpg image in Maple?

Hello 

I have maple 13, and I installed two new packages, the problem that I don't know where should I saved them and how to make them active to start using there routines ??? 

So pleas any one know how to add packages to maple 13, help me    :) 

I think that I found a bug in Maple! Please run the following command:

I need the Generators of above Ideal. What is your idea?!

I have a problem about the integration of a function. The maple returns mathematical form of the given command

the function is

fn :=(-4.079067798*10^(-16)+3.422708023*10^(-16)*I)*(3.363377947*10^(-11)+5.977507284*10^(-12038)*I+(3.363377947*10^(-11)+4.678081798*10^(-22)*I)*erf(1.664331698*10^15*qq-0.2503507367e-1-4.649313602*I)) *exp(-2.77*(qq/(tau*tau))^2)*exp(-I*w0*qq)*exp(-(ss-qq)/T_pop)

qq is the integration variable qq=-inf..ss

w0=10^15

tau=10^(-15)

T_pop=30e-15

I have this matrix

and I want a matrix which components are de real parte of the components of A. I have tried this:

but it doesn't work.

What is wrong?

Thank you so much.