## 15 Reputation

4 years, 293 days

## How do I find the eigenvalues of a symbo...

Maple 16

I am currently working on a project that generates a set of matrices and I want to find their eigenvalues, but using the inbuilt Maple engine takes too long. The problem is that whenever I try to use the Matlab[eig] command I get the error:

Error, (in Matlab:-setvar) unable to store '-3.*Re(X)' when datatype=float[8]
I found out that solving symbolic matrices in MATLAB requires first defining symbols with the "sym" command but I've been unable to do that in Maple.

## How to remove every second number from a...

Maple

"From the list of positive integers 1; 2; 3; 4; : : :, remove every second number, leaving
1; 3; 5; 7; 9; : : : Since 3 is the flrst surviving number above 2 that has not been used
as the \killer", we remove every 3rd number from the remaining numbers, yielding
1; 3; 7; 9; 13; 15; 19; 21; : : :"

I have tried using this:

A:= proc(n::integer)::list;
local B,C,j;
B:={seq(i,i=1..n)};
for j from 2 by 2 to n do
C:= {B minus {B[j]}};
end do;
end proc;

But I'm not getting the desired result.

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