Hello,

I'm solving a system of 3 second order ODE's for 3 unknown functions, using dsolve. But in the output, I receive various sets of solutions which contain only 3 constants of integration. A friend solved the same system but in Mathematica, and received more constants of integration. 

I guess this has to do with the issue that Maple omits additive constants of integration almost everywhere. 

Is there some solution? i.e. some way of using...

How do I uninstall everything associated with Maple Prime?  I don't know how I got it and don't want it!  I don't know what it does and don't need it.  Operating with new iMac running OS 10.7.4.  It's 3:36 AM and I've been trying to eliminate it fot the last several hours!!  Help now please before I go nuts!!

Charles Stiles

We need to compute some integral, containing product of some "regular" function (e.g. gaussian)
and Dirac delta-function. The problem is that argument of delta-function is itself a function.

A simplified example is

d1:=s->int( g(x,5,0.025)*Dirac( s-f1(x) ) , x=0..infinity);

By trials and errors, we figured out that Maple runs such calculation successfully
when this function is very simple and fails in more complex cases, i.e., integration  returns zero.

I am looking for a numerical scheme which can easly handle such type of problem.

I already had the analytical results of this problem, now I want to know how to treat this problem numerically.

Any idea, then please let me know.

Thanks

Hi, may I know how do i arrange rows on matrixes manually please?

For example, I have a 18x18 matrix. And for my new matrix, I would like to rearrange the whole row. For example the current rows are numbered 1, 2, 3, 4, .... 18. I would like a new matrix where rows are arranged as 4, 6, 8, 14, 2, 3...

Please advice. Thanks.

I am trying to solve a transcendetal equation that has no analytical solution (AFAIK).
My question is how to find different branches of solutions with Maple. So far, Maple
only returns one particular solution.

To fix ideas, my equation is of the type,
x-a*(1-x)* exp(bx)+c=0
For suitable values of a and b this equation seems to have, at least, two solutions in
the real axis and I would expect it to have a numerable infinite of solutions in the
complex...

Hello

I have an expression, say 

v(t) = .5*(sum(abs(q)*(J*exp(q*j*Wc*t)+K1*exp(q*j*phiK1)*exp(q*j*(Wc+Wx)*t)+K2*exp(q*j*phiK2)*exp(q*j*(Wc-Wx)*t)), q = -1 .. 1))

When I raise this quantity to a power, say (v(t))^3, I want the answer as well in the form of a summation. This system is frequently encountered for a voltage source, and I am looking to segregate the harmonics generation through the use of the...

System: Mac OS X 10.8.1 + Maple 16

I am trying to copy + paste a selected region from an image shown in Preview to Maple. The image is blank when it is pasted. Why is this not working as expected?

--
Chemistry / Chemical & Materials Engineering
UAHuntsville 

with(SumTools):
He := sum(((-1)^k)*n!/(k!*(n-2*k)!*2^k)*x^(n-2*k), k=0..n/2);
Gen := simplify(sum(He*z^n/n!, n=0..infinity));

convert(Gen, ratpoly);

Hi

I have solutions of a 4th-order differential equation as a solutions.dat file having 5 columns. In the same maple worksheet (not necessarily the same worksheet, though), I want to solve a system of differential equations using [columns 2] and [column 3]/[column 2] of soultions.dat as inputs.

Can anyone help me how I can implement this?

Thanks in advance.

Hi,

I'm trying to implement tan(x) over [-Pi/4,Pi/4] to have < 4ulp error.

How can I generate rational polynomial approximation so that that can be used to implement tan(x) in C.

Please suggest any references.

Thank you.

Hi every one,

I am trying to find a way to plot a dependent variable against a parameter. 

The data I want to use for this ploting should be from the numerical results

obtained by using shooting method.

restart:ShootLib := "C:/MP/Shoot9/":
> libname := ShootLib, libname:
> with( Shoot ):
> with(plots):with(LinearAlgebra):
> A:=0:
> FNS:={ f(z), G(z), H(z)}:
> ODE:={diff(f(z),z)  = G(z),

pick_pos.mw

Hey maple gurus

when i solve and equation with two real roots (1 positive and 1 negative roots), how do i automatically pick out the postive solution?

As you can see from the attached file, i used sort command to order it, and it works for examples1 and 2, but not for 3.

i guess i could use Abs cmd.....

I want to find the first term and the common difference of the arithmetic progression (un) with the following condintions u7 + u15 = 60 and (u4)^2 + (u12)^2 = 1170, but i can not the code. Please help me. Thank you.

given differntial equations with boundary conditions.

f'''(x)+f(x)f''(x)+1-[f'(x)]^2+A*{1-f'(x)-(x/2)*f''(x)}=0,
g''(x)+P*[f(x)*g'(x)-f'(x)*g(x)-A*{g(x)+(x/2)*g'(x)}]=0,

bc's

f(0)=k,  f'(0)=m, g(0)=1, 
f'(infinity)=1, g(infinity)=0

Dual solution exist in the given problem with shoot command i think. how we ll calculate them?

NOTE: