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)

How do I select multiple non-contiguous lines of text (or math).  I have tried cntrl-slect, shift-select, anything I can think of -select with no success.

Thanks in advance.

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

Has anyone used MapleSim to coordinate with Matlab/Simulink Model for the purpose of making their autocode the most effiecent?  I belive from  a webinar I watched something like this could can be an application of MapleSim.  I'm curious if anyone  has used it for that purpose?  If so, what were the challenges/benefits? Did you save in embedded memory needed (i.e. smaller autocoded files) or shorter proccesing time measured? 

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?

A small glitch

with(plots):
pointplot3d({[2,3,4],[1,2,3],[4,5,6]},symbol=box,axes=boxed)

The third point is missing from the plot however if I use axes=normal all three points are displayed but when the boxed option is enabled the point [4,5,6] is not displayed. 

It seems the autoscaling undercuts the last point and so is out of view of the plot.  In order to have the 3rd point visible (it is there) we need to use the view=[ xmin..xmax,ymin..ymax,zmin..zmax ] option.

I've bought a new computer recently and was disappointed, because Maple uses only 25% of that processor (my old computer used 99% of CPU).

I have Intel Core i5 750 processor (it has 4 kernels).
From the Screenshot you can see that It uses only 25%, but not because it uses only one kernel (it uses all 4 kernels).

If I open two Maple instances and run the same program on all of them at once then I get 50% of CPU used.

The question is:
how to force to use Multi-Kernel processor to work at 90% (if needed) with one single Maple program?

It seems that this isn't a limitation to Maple, but for all other programs as well.
For example,

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