Hi, I have a question about Gröbner bases and using the Rosenfeld_Grobner algorithm in diffalg. What is best to use? If the equations only contain time differentiated variables, is it better to differentiate the equations "by hand" first and let the Gröbner package deal with the problem or is it better to just plug the whole thing into diffalg from the start?

I am new to this forum and would appreciate any feedback. I do not use Maple myself but have users who report to me that when they use Maple 10 (both with and without the patch), if they go on to something else and come back to Maple, when they maximize it, the computer will randomly shut down. It only seems to happen with this application. Any one out there experience anything similar or know of any solutions. Thanks very much for any advice.

Hi again, Running Maple 10, WIN XP Pro, When I try and export worksheet as RTF Maple only exports a small portion. I have the "Disable Large RTF" checked as "Never" yet I still only get a small portion. Is this a bug? or am the one with a bug? TIA Larry Ciak aka malt_master@comcast.net

Hello, I have 32 pc installed with ghost. The OS is SuSE 10.1. I try to install Maple 10 but at the end of the installation of Maple I have the message "Unable to determine the host ID of your system" When I install Suse 10.1 fron the DVD, not from ghost, I can install Maple 10 without problem. I tried to fix the host ID with the command hostid but the Maple says "Unable to determine the host ID of your system" Some help is welcome

Hi all, Is there a Maple .INI file that I can edit so that I do not have to continually enter packages or change fonts for styles that I wish to use instead of the default values. For example: with(package) with(package) Set Maple to be initiated with any package without repetition? TIA Larry Ciak aka malt_master@comcast.net

I have programmed a procedure to calculate certain polynomials associated to matrices. There is a variable for each column of the matrix, say z1,...,zn, and the polynomials get quite large as the matrices grow in size. The procedure gives the correct answer but, for large matrices, the terms in the resulting polynomial are not collected properly. For instance, terms z1*z2*z3*z4 and -z1*z2*z3*z4 might both appear. "Simplify %;" does not cancel these terms. By copying the answer and pasting it as a command, I can cancel the terms but most answers are so big that copying cannot be done in practice (hundreds of pages).

Hi Community! I am using maple in excel and... I have a question When I introduce this expresion =Maple("array([[1,2,3],[4,5,6],[7,8,9]]);",A18:C20) The output is: matrix([[1,2,3],[4,5,6],[7,8,9]]) on cell A18. Why? The output don't share on each cell this array. On the cell A18 would be the first element of the matrix, 1 On the cell A19 would be the second element of the matrix, 2 ...until the cell C20 it element would be 9. Which could it be the solution? I hope, you understand me Thanks!

I'm wondering about the complexity on Gröbner basis. I think I've heard something about O(2^2^n) or something like that. Is that true?

I teach a Maple course in a computer lab. There are many problems with Maple crashes. I've had the autosave feature disabled, which seems to help some. I'm running Maple 10.04 (New GUI version, Network, Windows XP). Last year, I used Maple 9 Classic and it worked beautifully. Has anyone had a similar experience? Any suggestions for improving the stability of the program ?

Hi everybody! a few weeks ago I asked in this forum a question: http://www.mapleprimes.com/forum/partial-differetial-equation-heat First I have to say that is really nice how easliy it solves the problem. Now, I really need to see values in the solution (I mean, by given x and t). In addition, I want to create graphs of the temperture as a function of t (I mean to state x, and then to check the temperture as a function of t in this x). Only I know is to do graphs of the temp' as a function of x) How can I do all of those things? Thanks A LOT !!! RedFox (:

I'm trying to write a procedure which will (among other things) create a list of plot strcuctures and display them. For example: testplot:=proc(n) local i,P; for i from 1 to n do P[i]:=plot(x,x=2*i..2*i+1); end do; plots[display]([seq(P[i],i=1..n)]); end proc; But this doesn't work; apparently the plot structures I'm trying to create in the "P[i]:=plot..." line are somehow invalid. How can I make this work? Thanks, Alasdair

1. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, x) 2. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, s)

I wonder if somebody can help me with this problem. I am triying to use dsolve to evaluate the stress trayectories for a problem in elasticity. These means to solve numerically a nonlinear ode but with a rather complicated user-defined functions at the right hand side of the equation. I have used this function as a known function but in this way dsolve just does not work, it does not even start and it seems to me it does not recognize the independente as well as the dependent variables. Would be grateful if somebody can give me a hint here.. Thank in advance Raul Manasevich

Please help me on solving this two questions. 1. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, x) 2. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, y) 3. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, s) 4. sum(3*x[r]+1, r <> 5) 5. sum(3*x[`#msup(mi("r",fontstyle = "italic"),mo("&uminus0;",fontstyle = "italic"))`]+1, r = 5)

Hi,

I have a question concerning PDEs with initial conditions. The general solution to my PDE is achieved by:

PDE:=diff(p(x,y,t),t)=(x-1)*k1*p(x,y,t)+(y-x)*k2*diff(p(x,y,t),x)+
(1-y)*k3*diff(p(x,y,t),y);

ans:=pdsolve(PDE);

However, I would like to achieve the solution for this PDE with the initial condition p(x,y,0)=x^n. I have read all the information I could find under the help menu. If there is no way to define the initial conditions directly in the pdsolve function, then how do I get the solution of the PDE with my initial conditions given the general solution achieved by pdsolve?