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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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  • 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:

    Google Desktop search has already been widly used, so why not develop a plug-in for maple document and helpfiles?

    fsolve fails when eqs are 2D integrations

    > restart;

    > infolevel[all]:=0;

    > infolevel[evalf]:=0;

    hello,
    im tryig to install maple 10 on my suse 10.1 system. I allready edited the bin and replayed the "e" of the first "export LD_ASSUME_KERNEL" line with a "#".

    The installer installed after that but there are no files in my maple/bin folder... so i dont have a chance to exectue a file...

    thanks
    Dennis
    Perseverance pays. As someone else commented, Maple has been around for a while and their are different packages that are kept for backward compatability but may be incompatible with more modern versions. Likewise the basic tools that take advantage of the new packages aren't always in place yet. Now that I have a better handle on this aspect of Maple's structure I am having many fewer issues. I now know how to recognize the symptoms of such collisions. More specifically, while I was originally frustrated with VectorCalculus I am now quite a fan once I got a hold of how it works. I just needed to translate how I do things on a blackboard (or on paper) to how Maple wants to see it. Beyond that, I also have to be able to explain what I am doing to others. For anyone moving along the same path I suggest going back to basics. I pulled an old vector calc. book off the shelf and re-examined how to think about the basic definitions (I teach physics, not math, so I tend to take a lazy "let's just get it done" approach to complex math problems). I then saw immediately what the programmers were trying to do and how they were doing it. I also found it helpful to build some visualization tools which will help this coming year as I build some presentations. By going through the process myself and reviewing how I would go about generalizing some of the problems encountered in vector calc I was able to understand the approach Maple was taking.
    I'm new to this forum so I hope this is the right board to post this. I've been using Maple in windows for a few years, I usually only use Maple classic. Recently I installed SuSE 10.1 32bit (kernel 2.6.16.21-0.13-smp) on my desktop (dual core Opteron 165 with 2GB RAM), and I installed Maple 10 Linux version onto it. The problem is that the Maple classic often takes 30 seconds to 1 minutes to load some .mws files , while in Windows these files can be opened in 1-2 seconds. I've tried to upgrade to Maple 10.04, and the problem remains, and I noticed that after I typed "xample -cw" in the terminal, there is a message shows "only the first 8192 fonts would be catched"
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