Hi guys

How do you calculate the tensor product of 2 matrices in maple? Can't seem to find this simple operation in the tensor library.

I'm new to Vista, and I'm trying to get a network copy of Maple 11 to load correctly. I've read about the open/save problem, so I tried to run the install file as administrator under Windows 2000 compatibility mode, but the installation wouldn't finish properly, so I installed normally. Opening normally, Maple now runs fine except for the open/save problem. Opening as administrator andd under Windows 2000 compatibility mode, the program stops working before it finishes loading. I don't know what to do, I need this program for class. Please help.

how do i solve a matrix ^ 10?

thank you

Actually, I could just cut to the chase here...

I need to print out a 2-D ring and then attach that to a 3-D sphere.  The problem is that the 2-D ring will buckle as I attempt to attach the outer circumference of it to the sphere.

Hello,

I have problem with define external function with dll written in Visual Basic.

Declaration of function is

 

This problem arised in a math forum.

I would like to check wether the consecutive digits of a given positive integer (n) are in the first 100000 digits of Pi.

For example the given integer (n) = 1592653 and this is in 3,1415926535897.... so the result is true.

I also would like to use this pattern matching for checking the type of a variable in a procedure:

myproc:=proc(n::mytype)
...end proc;

The procedure accepts n if n fullfils the condition above.

As Demmel and others have noted, SVD is both more reliable and more expensive than QR as a method of solving rank-deficient least squares problems.

SVD is the method that LinearAlgebra:-LeastSquares will choose when the Matrix has more columns than rows (n>m), unless instructed otherwise using the optional 'method' parameter.

LinearAlgebra:-SingularValues always computes a full U and Vt. But for least squares computations, such as when n>m, this is not necessary. Including the smaller singular values may just be (re-)introducing noise. See here for more detail.

Here's a 20x2000 example, using wrapperless external calling and the SVD routine dgesvd in the CLAPACK library. The effective speedup by using the Thin SVD for that 20x2000 least squares example is about a factor of 100 (ie, 2000/20), with a similar reduction in additional memory allocation.

I have found this problem somewhere in a math forum: somebody wanted to simplify this expression ( I write it in maple syntax:, this was not a maple forum):

a:=(1253*sqrt(2)-963*sqrt(3))^(1/3)+(26209+10500*sqrt(6))^(1/4);

They tried with the simplify command of maple, but it didn't work, and they tried with Fullsimplify command of the other famous math program , and it worked. ( I haven't tried it.) The conclusion was that Maple couldn't do this job.

Actually Maple can do this job with radnormal:

radnormal(a);

14*2^(1/2)

I am having problems using implicitplot.  I run this code and it worked and today I tried it again and it gives me the following:

with(plots,implicitplot);

implicitplot(0=int(erf(  (T-e*t)/sqrt(2)  )*t^2*exp(-t/2),t=0..infinity),e=0..1,T=0..10);

Error, (in plots/implicitplot) invalid input: the following extra unknowns were found in the input expression: {t}

The weird thing is that this worked before (took about 10min though) and now it isn't.  Any suggestions?

Thanks

 

I am trying to plot q2:= (x) -> x*exp(x^2)*(1-erf(x)); for 0 <><>plot(q2(x),x=.1..10); then the resulting plot is incorrect. In reading other posts I get the impression that one needs to somehow prevent the plot routine(s?) from following their default behavior of refusing to compute with the

What is the big oh of the binomial coefficient

  n

(   )

  k

Hi, I'm hoping someone in here will be able to help me.

I've made two files in which I need to find a symbolic expression for the difference between two mathematical models of a mass, damper, spring system:

Hi,

            I have a question regarding  Chebyshev interpolation of data. How can I interpolate the following data by Chebyshev interpolation using maple?

X:=[16,45,85,120];
Y:=[4,7.2,1.6,0.5];

Thank you

 

I want to have a procedure define a function... If I do: >with(stats); >does_not_work:= proc(t) local v,d0,d1,x,y; > v = rhs(fit[leastsquare[[x,y], y=d0+d1*x]](t)); >end proc; then > does_not_work([[0,1,2],[3,4,5]]); results in "v = 3 + x" as expected, but if I try to have the procedure define a function d as in >does_not_work:= proc(t) local v,d0,d1,x,y; global d; > v = rhs(fit[leastsquare[[x,y], y=d0+d1*x]](t)); > d:= (x) -> v; >end proc; then > does_not_work([[0,1,2],[3,4,5]]); > d(1); does not result in 4, which should be the result of applying

Okay, I'm just really starting to get into Maple again, but I'm having a little trouble getting a package to work.

I'm trying to take a look and review the precalculus package from the application center but it doesn't seem to work. 

It's from maple 7.  The new version doesn't seem to follow through on the commands made.