Hello,

I am working on a Maple project and it require me to pass a differential equation in a specific order like

x'=y & y'=x^2.(It is differentaiting w.r.t 't'(say))

However when I convert the equation into string it converts something as

diff(x(t),t)=y(t) & diff(y(t),t)=x(t)^2

Is there any way to stop maple from evaluating into maple/math format?

Is there any way to pass an equation without changing it's existing form?...

How to successfully deploy Matlab function [B, IX] = sort (A, ...)
IX is a permutation vector of the corresponding column of A

M := Matrix(6, 3, [2, 3, 3, 5, 7, 8, 12, 5, 9, -3, 4.1, 7, 7, 7, -3, 9, 3, 8]):
M;
L := <(seq(op(convert(sort(M[() .. (), j]), list)), j = 1 .. op(M)[2]))>;
L := ArrayTools[Alias](L, [op(M)[1 .. 2]], Fortran_order);
P := Matrix(op(M)[1 .. 2],  (i, j)-> ListTools[Search](L[i, j], M[() .. (), j]));
# from Matlab

I had MAPLE 12 on WINDOWS VISTA machine and the harddrive crashed.  Now I have a newer WINDOWS 7 machine & would lke to put my individually licensed MAPLE 12 on this machine.  I do not have a DVD because the original installation occurred via MAPLESOFT website if I recall correctly.

Can anyone direct me as to what I need to do?

THANKS

Hi,

I'm having some problems with the generation of the typical stiffness matrices seen in FEA formulations. I have got an elementary matrix that is looped through the entire stiffness matrix to generate it. As there is juxtaposition between the elementary matrices, there is some recursive assignment involved that I can't handle properly. Here is the code for a 6x6 elementary matrix with a 3x3 juxtaposition. n is the nombre of recursions needed to fill the stiffness matrix. M is the elementary matrix

On my keyboard, Cntrl = action for evaluating an expression inline does not work. The reason is that = is the upper level action (with the shift key) on a key with 0 at the lower level. Doing Cntrl Shift = does not work either. How do I get this done on my keyboard?

What is the number of all the solutions of the equation frac(x*floor(x)) = 1/2 belonging to RealRange(1,100)? How to count it with Maple?

Hi,

is the series expansion for the following expression bugged in maple or am I missing some crucial thing of series?

series((1/epsilon-log(4)),epsilon=0);

results in epsilon^-1 -2 -2*ln(2)

for xmaple 16.01. The console version does not add the wrong term "-2".

Apparently it works here: 

i got two density, the part of it is similar the pattern of gamma, how to convert it into an expression of gamma times something?

test2 := x*Diff(P,x$2)+(a+1-x)*Diff(P,x)+mu*P=0;
Density := int(exp(-X*(I*u-a*i))*(-i*X)^(-a), X = -infinity .. infinity);

test2 := x*Diff(P,x$2)+(a+b-x)*Diff(P,x)+mu*P=0;
Density := int(-exp(-X*(I*u-a*i-b*i+i))*(-i*X)^(-a-b)*i*X, X = -infinity .. infinity);

How is it possible to let multiple cores compute a loop faster?

For exaple:

for i = 1 to 1000 do

*computation(i)*

end do

The goal is to let a quad core cpu split the 1000 independant computations in 4 packages of 250 each to speed up the computation by the factor 4 so that core1 computes i from 1 to 250, core2 from 251 to 500 and so on, at the same time. Is this possible?

A triangle is given.The points

Hi, i have the following question: i've been asked to investigate the following family of functions:

f(x,y)=(be^a(x)^2)+y^2

the question is: How does the shape of each curve depend of a and b.

Thank you

Hi, I wrote a set of codes that worked perfectly fine 2 months ago, but when I try to run all my files again, this statement came out :

"Error, Got internal error in Typesetting:-Parse:-Postprocess:"intercal error:invalid object""

Could someone please explain what is the meaning of this please? Thanks

Hello every one,

I want to plot two parameters against each other from a system of ode.

The system is

restart:

with(plots):with(LinearAlgebra):

Eq1:=diff(f(eta),eta$3)+f(eta)*diff(f(eta),eta$2)-diff(f(eta),eta$1)^2-M^2*diff(f(eta),eta$1)+M^2*b+b^2=0;

Eq2:=diff(g(eta),eta$3)+f(eta)*diff(g(eta),eta$2)+(Lambda-2*diff(f(eta),eta$1)-M^2)*diff(g(eta),eta$1)+diff(f(eta),eta$2)*g(eta)=0;

N:=10: M:=0.1:

bc:=f(0)=0,D(f)(0...

Dear friends,

I ran into another problem while using Maple to do residue calculus. The following call

residue(1/x^(1/3)/(x^2+2*x*cos(phi)+1), x=-exp(I*phi));

returns zero -- it does not recognize the residue. On the other hand, if I do a subsitution like this

subs(x=-exp(I*phi), 1/x^(1/3)/(x^2+2*x*cos(phi)+1));

followed by

convert(%, trig); simplify(%);

then I get a divide by zero error, which shows that the...

hi everyone,

I need to plot a graph for system of nonlinear equations with multiple variables. 

here is some example of system nonlinear

f1=3.65a^2-2ac-7ad+3.65b^2+7bc-2bd-1.65a+6.22b+0.5=0

f2=13.22a^2-7ac+2ad+13.22b^2-2bc-7bd-6.22a-1.65b+0.24=0

f3=2c^3-2ac-7bc+2d^2+7ad-2bd-0.2=0

f4=c^2+d^2-1=0

with initial condition (0.7, 0.2, 0.6, 0.3)^t. I solved this using Newton's method and here the iteration