Hi all, Using maple 10 classic version, I am working with the below function of f(x): restart;fx:=cos(x)+2*sin(x);plot(fx,x=0..2*Pi,y=-3..3); I would like maple to show the x-axis values as radian instead of 0 to 6. How do I do this? If I now differenciate fx and find the value of zero I get the answer of arctan(2) fmx:=diff(fx,x);solve(fmx=0,x); Now I would like to visualise this by plotting a line from x=arctan(2) vertically to function f(x). How do I do this?? The maths is in place, its just getting maple to do what I want it to that creates problems ;-) Thanks in advance for any help.

Maple 9.52 outputs 0 to the expression, specified in the title:

> int(Dirac(x)*Heaviside(x+c), x=a..b);
0

while the answer I expect should be: Heaviside(c) if 0 belongs to [a..b], and 0 if [a..b] does not contain 0. In other words, it should be Heaviside(c)*(Heaviside(b)-Heaviside(a)).

Is my expectation correct? If it is, how to force Maple to provide the correct output?

Thanks in advance,
Anton Travleev.

One of my students was surprised at what happened after this command: > plot([sign(x), 'sign(x)' ],x=-1..1,color=[green,red]); I was too. One would expect to see an overlay of the green and red graphs. You don't. Curious. Jim Herod

Maplesoft just announced that a new version of Maple has been released that works on Intel based Macs. You can get full information on how to download this update on the Maple 10.04 download page The full press release is found below:

suppose you have the following equation a+bx=3+4x is there a way to have Maple compare the coefficients and come up with the a=3 and b=4 solutions? thanks

Hello everyone, I have written a procedure that makes some calculations for me, which I am calling repeatedly using a simple for loop. Basically what I am doing is using the for loop to change one of the several input parameters to the procedure and then use the result. Here is a quick example: > transmission0:=Matrix(1200,2): reflection0:=Matrix(1200,2): > for m from 1 to 1200 do > freq:=0.0416666666*m: > rcwa(31,0.0,0.2998/freq,6.0e-3,1.0,2234.950223+2237.186291*I,2.042123126+0.1633593958e-1*I,2234.950223+2237.186291*I,1.0,0.8333,18.0e-6,356.0e-6,18.0e-6): > transmission0[m,1]:=freq: >transmission0[m,2]:=te[M+1]:

I tried to solve this eigen value problem. I have a complex trigonometric function, whose graph looks similar to a tan function curve. I cannot use fsolve to solve for all the solutions at once, since the function has jump discontinuities. I am able to plot the function for small ranges and then from the plot, I use the fsolve command to determine my range of solution. Is there a way I can automate this process, meaning, can I write a program wherein I can get all the roots of the functions (w/o the jump discont. being shown as a root)at one go. Any help would be appreciated. Thanks

I am using a thir-party package made for Maple called HPC-Grid which enables parallel distribution of Maple programs over several porcessors. I wonder if anyone has any experiece using HPC-Grid. I am having problem with distributing global variables over the computing nodes. Can someone give me a hint on how to do it? Thanks

Maplesoft is providing an advance notice of changes to platform and operating system availability in the next major release of the Maple product family. Our current plans are to discontinue support for the IBM AIX, HP-UX, HP TRU64 , and SGI IRIX platforms and the Windows 98, ME and NT operating systems. Please see www.maplesoft.com/futureplatforms.aspx for full details.

Maple shuts down when a 3d plot is left clicked. It produces an error log file which says: An unexpected exception has been detected in native code outside the VM. Unexpected Signal : EXCEPTION_ACCESS_VIOLATION (0xc0000005) occurred at PC=0x692287D5 Function=atiPPHSN+0x187535 Library=C:\WINDOWS\system32\atioglxx.dll My ATI video cards are both (there seem to be both a primary and secondary) RADEON X800 XT Driver: ati2mtag.sys Wednesday, August 25, 2004 I'm not sure if I've done a 3d plot on this machine since I installed Maple 10 (and since updated to 10.03). But this has never happened before.

hi , can anyone tell me what's wrong with my codes ?? THANK YOU > restart: > with(LinearAlgebra): > A:=Matrix(2,2,[[100,600],[200,400]]); [100 600] A := [ ] [200 400] > list2:='list2': > list1:=list1: > n1[0]:=200: n2[0]:=200: list1[1]:=[0,n1[0]]: > for k from 1 to 1000 do > alpha[k]:=n1[k-1]*(100*n1[k-1]+600*n2[k-1]); > beta[k]:=n1[k-1]*(n1[k-1]+n2[k-1]); > gammas[k]:=(n2[k-1]*(200*n1[k-1]+400*n2[k-1]))/(n1[k-1]+n2[k-1]); > five[k]:=n2[k-1]*(n1[k-1]+n2[k-1]); > alphahat[k]:=(alpha[k])/(alpha[k]+beta[k]+gammas[k]+five[k]);

Hi, I have a matrix whose entries are polynomials in x. Is there a procedure/function in maple to find the element with the largest degree. I would liek this function to return 1. The largest degree 2. The element itself 3. The location [i,j] of this element in the matrix. Could anyone please help ?

Hi All, Recently I performed a system restore, then I am unable to use Maple any more. When I ran Maple, I received a topup windown displaying "The license manager file could not be located" and an 'OK'. Reinstall Maple can solve the problem, but anyone has any idea to get it working without re-installation? some info: Operation System: WinXP SP2 Maple: Single user profile with a serial number in installation CD. Maple was installed in local disk D:\ while Windows installed in disk C:\. Only C:\ was set to have System restore function so D is actually not affected during system restore.

Recently I met problems like these (shown  here in  minimal, stripped down examples no longer doing

anything useful except illustrating the problem). Any suggestions about what is going on here would be appreciated. Thanks.

> interface(version);restart;

Maple 10.03 gets stuck on my machine (Mac OS X, version 10.6.4) evaluating  the  first execution group below,t hough in Maple 6 on Mac OS 9.1 one gets only some strange output  (?s, similar to those in output below). In the procedure f, the parameter W is intended to be a module exporting  a procedure  W:-m; the behaviour is not improved  by careful type declarations, so for simplicity I've left them out.

Hi, I have a small problem about returning the result from dsolve from a function in a package. In principle the problem can be described as: Package[Function] := proc.... dsolve(differential equation in x(t),numeric,method=mebdfi); end proc; In Maple: solution := Function(....); odeplot(solution,[t,x(t)],t=0..1); The result is the error message: Error, (in odeplot) curve is not fully specified in terms of the ODE solution, found additional unknowns {x(t)}, which in some way depend on that if I write subs(solution(0.5),x(t)); I get x(t) as result, ie, not the value of x(t) in t=0.5 which happens if I run the same stuff only in Maple command window.