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 .please see attached file below and help me

thanks..indices(res_nolist).mw

Not homework (from the telly): A gallery takes a concave polygon shape with a square pillar in the centre. security cameras can do a 360 degree sweep but they can't see around corners. The cameras have to be attached to the walls. What is the fewest number of cameras such that they can see everywhere in the gallery?

I got as far as drawing it in Maple.

polygon_cameras.mw

there is an algorithm -which supposedly finds the optimal solutuion- breaking the object into triangular shapes. that gets an answer:  4 cameras.

EDIT 11/10

this is based on Fisk's short proof. See Markiyan's wiki ref below.

1.first stand on on a corner and scan clockwise around the room. Any two corners passed creates one triangle.

Repeat for every corner

2. Pick three colours and allocate each color to each corner of each triangle.

sometimes you will end up with a triangle which has 2 corners of the same colour. This one has two blue corners

This triangle must be broken in two and add a green dot

3.finally the algorithm places cameras on the colour which occurs least.

But by experimenting with more complex shapes (convex polygons) you can cover the gallery with 3.

In Maple anyone?

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?

Download Problem_with_Defined_Tetrad_Function.mw

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?!