Hi, 

How can I create a matrix M by M with maple, where the elements of diagonal comes from b[i]=i+1 and the other elements comes from c[i,k]=i+k.

Amr

Hi

I want to find the optimum of

G*(.7500000000*B*sqrt((1.-2.*a+a^2)*B^2/(a^2+B^2-2.*B^2*a+B^2*a^2))-.7500000000*B*sqrt((1.-2.*a+a^2)*B^2/(a^2+B^2-2.*B^2*a+B^2*a^2))*a+.7500000000*a*sqrt(a^2/(a^2+B^2-2.*B^2*a+B^2*a^2)))

+

(1-G)*(-6.250000000*10^(-12)*sqrt(a^2/(a^2+B^2-2.*B^2*a+B^2*a^2))*(5.833333333*10^9*B*sqrt((1.-2.*a+a^2)*B^2/(a^2+B^2-2.*B^2*a+B^2*a^2))-7.500000000*10^9)*(4.*a-3.*B*sqrt((1.-2.*a+a^2)*B^2/(a^2+B^2-2.*B^2*a+B^2*a^2))+3.*B*sqrt((1.-2.*a+a^2...

hello all, I'm trying to solve ODE's but my computer takes a very long time evaluationg. and still not giving an answer for more than 4 hours.

so please is there anything error in my solution

deqs := {NULL
         , diff(u2(y), y, y)-((h^2/K)+m*h^2*M^2)*u2(y)+m*b*rho*h^2*GR*(c3*y+c4) = 0
         , diff(u1(y), y, y)-((1/(K*(1+k1)))+(M^2/(1+k1)))*u1(y)+k1*(diff(N(y), y))/(1+k1)+GR*(c1*y+c2)/(1+k1) = 0

Hello

I want to solve a cylindrical PDE with Maple. how can i solve it?

Hi, Can anyone help me in solving the following system of ode, i'm new in maple and i faced some problems in using it.

the system:

diff(u2(y), y, y)+m*b*rho*h^2*GR*(c3*y+c4) = 0,

diff(u1(y), y, y)+K*(diff(N(y), y))/(1+K)+GR*(c1*y+c2)/(1+K) = 0,

-2*K*(2*N(y)+diff(u1(y), y))/(2+K)+diff(N(y), y, y) = 0

with the following boundary conditions

u1(-1) = 0, u2(1) = 0, u1(0) = u2(0), (D(u1))(0)+K*N(0)/(1+K) = (D(u2))(0)/(m*h*(1+K)), (D(N))(0) = 0, N(-1) = 0

Hello,

I want to evaluate an integral over the Dirac function with basically the following assignments. (I had some troubles parsing here...) Then I want to plot function rho(epsilon). What I get is just an empty graph with nothing displayed although test has only values in the range -3...3. I am pretty new to maple and don't know how to compute this in another way.

> test(x,y,z) := .2686733768*x^2+.2686733768*z^2-.2178281566+.2686733768*y^2+(-1)*1.000000000*sqrt...

Hi

I have a little problem, I tried to find out the Temperature of the Electrons in a Plasma,

the cross section name is sigma and I'm working with noble gases and there Threshold energies.

In the end I wand to find out  T_e but there comes only "Warning, solutions may have been lost"

Can anyone help me please?

Thank you very much

greetings from munich

i'm working on a short program to put random points on a sphere , but i have some difficulties :
 i consider a sphere  where  i choose  n  points  with  "randpoint" then i plot it but it doesn't work if someone can help me to correct my program

here is the program :

>with(geom3d):
> with(plots):
> s2:=sphere(s3,x^2+y^2+z^2=1):
> sphere1:=(x,y,z,R)->[x+R*cos(phi)*cos(theta),y+R*cos(phi)*sin(theta),z+R*sin(phi)]:

In the Belgium lottery they pick 6 numbers out of 42   (  there can't be 2 equals numbers being picked out )
Now for my maple homework , i must do some exercices in maple

1 ) Simulate the lottery
2 ) If you partici