Help me, thank a lot

I am looking for help with basic algorithms to approximate numerical solution to the N body problem. I have been trying to develop basic algorithms using Runge Kutta, Euler ect. Initially I specified to the 3 body case and the equations of motion. I am now trying to develop a more general algorithm. If anyone has knowledge in this are or can look through my annotated procedure to see where I have gone wrong I would appreciate it. I am very new to maple and would appreciate detailed exposition, "for dummy's", if you will. Thanks in advance

Hello, recently I am working to write a bash shell program combined with maple to automatically produce the codes to calculate functional and functional derivatives values for some given functional expression(This is provided by the user in maple input file). Now I meet a problem.

Take the codes below as an example:

I tried the following:

restart;
with(Statistics):
X1 := RandomVariable(Binomial(n, p)):
DARA := t->piecewise(0<t,log(t),0):

0 < n, n::posint, 0 <= p, p <= 1:
 

ExpectedValue(DARA(X1));                                        
g1 := simplify(%) = DARA(s);
k1 := solve(g1, s);
 

Hello, In maple, I am defining a differential equation similar to: (x^2)*diff(y(x), x$2)+x*diff(y(x),x)= a cubic in y(x). When I try to solve this using dsolve, numeric, I receive some form of memory error, stating that something small*I cannot be stored in datatype = float[8]. Sorry this isn't too specific - if you need more info or the boundary conditions, or perhaps the error message word-for-word, I'll reply with it when I get to my other laptop. Thank you very much for your help in advance, Marc

Hey guys i am currently attempting to do some modelling with maple, i need to solve a PDE system, i am using the following code and am confused with the error i'm getting. restart: M[Star]:=2*10^30: M[planet]:=2*10^27: q:=(M[planet])/(M[Star]): g:=sqrt((R-a)^(2)): H:=0.0333*R^(1): Delta[p]:=H: Alpha := unapply(piecewise(R <> a, 6.67*q^2*10^(-11)*M[Star]*(a/Delta[p])^4/(2*R), R = a, 1), R, a)

Hello! I have a problem - i can't find standart Maple functions and procedures, that plot, so to speak, "phase portrait"-esque magnetic field lines for featured "vector field". In details: i need to plot magnetic field lines and equipotential curves of uniformly magnetized cylinder. I have piecewise functions Hr(r,z) and Hz(r,z), (per se, r is x, z is y, y-axis coincides with cylinder axis): L := 2; a := .5

Hi

Does anyone know how to export surface plot with multible surfaces to a file format that can be easily plotted using matlab?

Thanks in advance

Regards Brian

Hi,

I'm using MAPLE 13 on Mac OS X 10.5.8 with a "French keyboard".

Suppose I set

a:=plot(x^2) or some other complicated expression, but just for simplicity sake

Then I go ahead fill up a worksheet then change the a to b in the same line and alter the expression for variable b (because I didn't want to type out a new line for the variable)

How do I recall what I've set a equal to? 

eval(a,1) - just returns the plot and    print(a,1) - returns PLOT(...),1

I think there's a way but I can't recall.  Can someone point me in the right direction?

the equation is like the pic below:

int(sqrt(1+16*a^2*y^6+24*a*y^5*b+16*a*y^4*c+8*a*y^3*d+9*b^2*y^4+12*b*y^3*c+6*b*y^2*d+4*c^2*y^2+4*c*y*d+d^2), y = 0 .. .2)

i try it by Maple ..but did not get any answer of it ! anyone can help me with this ??or there is no real answer for it ?

since the equation got 4 unknown constants which are a,b,c,d ...so how to use maple to solve it ???

any idea and comment will be much appreciated ...thx

I have a multivariable function, F(n, g(1,0),g(0,1),g(0,2),g(1,1),g(2,1),...,g(n,1),g(n-1,2),...,g(1,n)), of indeterminates g(i,j) (omitting g(0,0) - in other words - let L = set of all pairs of nonnegative integers, (i,j), which satsify 1<= i+j <=n) of the following form F = product over all the (i,j) in L of g(i,j)^h(i,j) / ((i!

I want  to calculate the derivative of Bessel, I do

why dont any of maples 11, 12, or 13 work properly in windows seven? for example: when i click on "open a file" or "save" botton, and then it opens a window, the respective window dont show "up one level" or "create new folder" and "details" bottons above it.

Hi

How can add the values of a list with the list as an argument of a function. As exmaple:

f([1,2,3,4,5]);

                              15

Thanks for any help,

Dat