This worksheet is created with Maple 14, which works fine. Running it in Maple 15 I got a message "Connection to kernel is lost" or something the like (the message was in Chinese). I am under Mac OSX and the worksheet makes use of the grtensor ii package freely available on the net.  Any assist please?

C-metric-4d.mwC-metric-4d.mw

Hello, I'm Tam and I had a problem with Conditional of Jacobi Iteration.

So, the proplem is:

>restart;

>with(LinearAlgebra):

A:=Matrix([[5,1,-1],[0,4,2],[-1,2,-7]]);

And I want to check the condition

with the maple program.

Fisrt, I typed

b:=sum(abs('A'[1,j]),j=1..ColumnDimension(A)); and I got b:=7

Hello,

For a face recognition program I need to import all the jpg files that are in a map
on the hard drive. I can already do this by f(i):=Read("C:xxx\\xx\\xxx\\xxx.jpg"); 
that gives f(i) a single jpg file.
But this requires every file to be imported separately. Is there a way to import all the jpg
files from that map?
e.g. f:=Read("...\\*.jpg"); that would give f a list of all the jpg files in the map.

KR 

It is possible to thicken the axes of 2D plots by adjusting the underlying data structure, since the appropriately placed THICKNESS() call within the PLOT() data structure is recognized by the Standard GUI. This does not seem to be recognized for PLOT3D structures, however.

The issue of obtaining thicker axes for 2D plots can then be resolved by first creating a plot, and then subsequently modifying the PLOT structure.

The same techniques could be used to thin...

When I use the solve command in Maple15 nothing happens. I just want to solve for V and Cf.

Does maple not like implicit equations? The file is attached

hi,

how to solve Ax=0 ?

A is 8*8 Matrix and det(A)=0
how to find x (x1,x2,...,x8) ? 

thx;

aryan.

Simple question:

Solve y''(x)-y'(x)+2y(x)=10e^(-x)sin(x)

Mathematica answer:

which is correct.

Maple 15 can get the homogeneous solution (the first two terms) but the particular solution? Not as we know it.

y(x) = exp((1/2)*x)*sin((1/2)*sqrt(7)*x)*_C2+exp((1/2...

I am evaluating a difficult integral of an oscillating function.

f:=k->evalhf(piecewise(k=0,1,k>0,cos(k*(dz))*BK0(k*rho1)/BK0(k*a)));

evalf(Int(f, kmin..kmax, method = _d01akc,epsilon=eps,maxintervals=1000000))

with dz>0 and possibly very large
kmin is Pi/(2*dz)
the number of cycles is nc = ceil((1/2)*kl*dz/Pi) with kl = 91.563
kmax=  kmin+nc*2*Pi/dz

Each evaluation of this integral using a call to the NAG routine (_d01akc ) eats up 

hi;

when run file , maple give wrong result, plz help me

my file is attached

thx

 EKM3-cylindrical_pan.mw

CTmodel-1.mw

Can anybody spot the problem in the second solve() in the attached file?  I am using the same approach that I did for the first solve(), but Maple is returning any empty list. 

Thanks!

with(Statistics):
Phiinverse := (x) -> Quantile(Normal(0, 1), x) :

evalf(Phiinverse(1-1/2^24));

and the result is 5.691523310-2.147372008*I

Now, I can get a real-valued solution to this by using the equivalent
functionality from stats instead of Statistics.

with(stats):
PhiinvClassic:= (x) -> statevalf[icdf, normald[0, 1]](x):

evalf(PhiinvClassic(1-1/2^24));

Hello,

     I just purchased Maple and I am just learning calculus pretty much for fun.  I am reading "Calculus Made Easy" by Sylvanus Thompson.  On page 56 there is a set of equations for which I would like to know the steps.  I was wondering how to do this in Maple.  I played around with the Student and Tutor commands, but can't seem to get it to work.

     The equation is y+dy=(x+dx)^-2

 ...

well first of all this site was very useful for doing my homework, but there is still something I didnt find on it and im sure other people may find it useful.

I have a system of 5 ode's and 6 initial conditions that ive solved successfully and plotted the graphs i need:  Position VS Time

          Speed VS Time

The only thing I initially know is the final position, which i can read on the first graph and...

I've submitted an application to the Application Center: An Epidemic Model (for Influenza or Zombies).  This is an interactive Maple document, suitable for instructional use in an undergraduate course in mathematical biology or differential equations, or a calculus course that include differential equations. ...

I Follow the instructions to connect with matlab but when i type for example ( Matlab[setvar]("x",3.14);) it doesn't work.

i don't know why? my windows is 7 .