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MaplePrimes Posts are for sharing your experiences, techniques and opinions about Maple, MapleSim and related products, as well as general interests in math and computing.

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  • After installing the critical security updates for Windows 2003 (August Bulletin) I've found that Maple 10 will no longer start. The splash screen appears though there is no progress bar. The splash screen (mws32.exe?) eventually dissapears silently leaving behind an orphaned maplew.exe.

    Has anyone else had a similar experience with these updates?

    Note: Classic Maple 10 starts with no problems.

    According to the helpfile, the syntax for using the command ReplaceChild in the XMLTools package is ReplaceChild(spec, XMLtree) where spec is an equation which is acceptable to subsop(). However, when I try to do this: XMLTools:-ReplaceChild( [1,1]="foo", doc); where doc is an XMLtree I have previously defined, I receive this error message: Error, (in ReplaceChild) child position must be specified as a positive integer, but received [1, 1]. Sounds like yet another oversight in XMLTools.
    I'm in the process of manipulating Maple worksheets (both Classic .mws and Standard .mw formats) blindly from the command line. There are a surprising number of stumbling blocks in Maple that make this work difficult. While I've managed to worm my way around them one by one, I thought I'd take some time to just voice my frustration so that others are aware of these pitfalls.

    I should note that I am using Maple 10.02 on a Gentoo Linux machine, feeding my commands into Maple through a standard pipe. I would update to Maple 10.04, but the updater program from the website continues to cause problems with Java. Another complaint? That might as well be...
    I have the following matrix solution problem. A-1 * C * D-1 * A * v = v where C is a square matrix (integer values). A & D are diagonal matrices. (A-1 and D-1 are inverse matrices) The diagonal elements of D are the column sums of the matrix C. The diagonal elements of A also are integer valued). v is a vector of variables whose values I want to solve for. I cannot figure out how I can get Maple to do this. Do I need to use some other software? It seems to me that I should be able to obtain a soltion to the problem. Is there a reason why there may be no solution? Thanks.
    As most of you have probably experienced, even Maple 10.4 in standard 2D Maple input has some strange editing behavior. Most of it is of the variety of "What you see is Not what you get". There are two basic kinds of things that can happen: (a)You get strange errors that seem impossible from the code that you can see, such as "missing operation" or "object used as name" or even "non-matching delimiters"; and (2) Your editing action happens much further away or much more extensively than your cursor position or highlighting would indicate. This apparently happens because Maple is creating a parsing structure on the fly behind what you are editing and not visible to you. When some incomprehensible errors happen or Maple seemingly does not want to allow you to edit what you see is wrong, sometimes the only remedy is to retype whole blocks of code (possibly creating other errors in the process requiring the same cure, etc., etc.). Till Maple can supply us with a structural viewer that would allow us to easily find and correct such problems, I want to pass along some tips I have learned in my frustration.
    Hello, I would like to use the solution of an ODE as a function in Maple. For example: ode := diff(y(x),x,x) = 2*y(x) + 1: dsolve(ode); The result, returned by Maple: y(x) = exp(sqrt(2) * x) * _C2+ exp(-sqrt(2) * x) * _C1 - (1/2) Now my question is how can I use this result as a function for calculating for example y(1). Thanks for your help JanE
    Hello,

    Im meant to create a program to compute inverse tan - tan(^-1)(x)

    to a given accuracy. They gave examples in class of how to do it for

    1+1/2+1/3+...
    1+1/2+1/4+1/8+...
    sin(x)

    like to 8 decimal places or whatever.

    here's what i got on my screen.

    http://kr.cs.ait.ac.th/~radok/math/mat6/calc6.htm
    This sort of has an explanation on how to get the taylor series for inverse tan. basically i was gonna try to copy and paste the output for the sin(x) eg. and just swap the taylor series to see if it would work.

    ANY HELP WOULD BE APPRECIATED.
    OUTPUT:

    > sum_ex1:=proc(x)
    Hello all, I'm trying to plot the graph of 0.01*x''(t) + [x'(t)^2] = 0 , x(0)=1,x(1)=0, using the following program: >ode:={0.01*diff(x(t),[t$2]) + (diff(x),t)^2 = 0 , x(0)=1,x(1)=0}; >S:=dsolve(ode,x(t),type=numeric,method=bvp[midrich]); >plots[odeplot](S,[t,x(t)],0..1,color=green,style=line,symbol=square,symbolsize=8); Before I can write the third line of the above code, I get a message saying "Newton iteration is not converging." I have tried increasing the absolute error,by adding the item "abserr=1e1" next to the item "method=bvp[midrich]" in the second line of the source code, but no joy there--the error message still comes up. Can someone please tell me what I can do to eliminate the error message and hence plot my graph? Or is there an alternative Maple program that I can use to plot the graph? Please note that the above program is NOT an initial value program, but a boundary value one. Thank you.
    Will maple show Plank's constant "hbar" as one letter not three letters in 2D output?

    > restart;

    dotpro := (psi,phi,L)->int(evalc(conjugate(psi)*phi),x=-L..L);

    dotpro(exp(I/hbar*p*x)/sqrt(2*L), exp(I/hbar*q*x)/sqrt(2*L),L);

    I'm not entirely sure if this is the best place to post this topic as it doesn't necessarily fit any of the forums perfectly, but, regardless, here goes: I was wondering if there are any applications or Maple add-ons in existence that harness Maple's two and three-dimensional plotting facilities for use in diagram creation for inclusion in something like a Latex document. I'm familiar with the capability of Maple to export a plot or graphic as something like an encapsulated postscript file, but I was curious as to if there was a tool geared more towards diagram and image creation for publications (articles, books, papers ,etc.).
    I recently installed Fedora Core 5 (64-bit) on a new multi-pro server (AMD Opteron chips) that my colleagues and I are planning to use for some of our research work. One of our preferred applications is Maple. We recently site licesned a netwrok version of Maple 10, and proceeded to start the process of installing it on our new machine. In advance, I googled 'Fedora 5' and 'Maple', and discovered that a lot of folks have had problems with the installer .bin becuase the installer tries to set the environment variable LD_ASSUME_KERNEL=2.4.1 Well, news flash for Maplesoft - more and more kernels no longer support this bakcwards compatability (including RHEL 5, and Fedora Core 5, and I'll guess Suse 10, and a lot of other distros using the 2.6.x kernel).
    We've just uploaded the new MapleCast episode. This espisode offers excerpts of interviews that I conducted at the recent Maple conference. T4.

    The MaplePrimes file manager is a feature that makes it easy for people to share their files with each other. With just a few clicks, you can post an attractive image, an HTML version of a Maple worksheet or even a fully interactive worksheet on MapleNet. Read on for the details on how to use this tool:

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