@Markiyan Hirnyk 

It *assumes* that some K is over Z, so alpha - 1/alpha is in Z (and thus real).
Which is not the case for n=5

Additional comment

The reason for that way: one could use the Jordan form for that M, it is a diagonal
matrix with non-zero entries. Now choosing roots for the diagonal entries gives roots
for M in an explicte way (without using 'MatrixFunction', I think that selects some
specific solution through a series approach).

However there are n possible selections for each entry. And I am not sure, that this
would give all possible roots (over the complex). So I avoided the Jordan form.

forget my nonsense about conjugate

Nice!

But that is a somewhat ugly notation: I do not understand, why they do not also provide the point(s) in homogenous coordinates of P^2(C) + order of the 3 variables ... may be my taste is strange this day

Nice!

But that is a somewhat ugly notation: I do not understand, why they do not also provide the point(s) in homogenous coordinates of P^2(C) + order of the 3 variables ... may be my taste is strange this day

I get the error message too often, tried to reply to http://www.mapleprimes.com/questions/145347

Lost patients, it is messy and not stable

"method" only makes sense, if you intend to evaluate, especially "_d01amc" onyl  makes sense if you are going to evaluate a) numerically and b) restrict to hardware evaluation and c) do not use more than 15 Digits

"method" only makes sense, if you intend to evaluate, especially "_d01amc" onyl  makes sense if you are going to evaluate a) numerically and b) restrict to hardware evaluation and c) do not use more than 15 Digits

@bryon 

Ok, makes sense. It does not work for me though, it only shows "Contact Author"

Edited: Now it works.

editing own post no longer possible?

As far as I can see one needs to allow jquery.com in order to let the site work.

Is it only for http://code.jquery.com/jquery-1.8.3.js ?

here is mine (not very elegant and it is slow) - but shows differences

use the checking at the end, that the norm of the solution is correct if using high precision

MP_w21_solution.mws

here is mine (not very elegant and it is slow) - but shows differences

use the checking at the end, that the norm of the solution is correct if using high precision

MP_w21_solution.mws

@Preben Alsholm 

Sorry, my fault (may be because I hate those standard sheets ...)

You forgot to provide or include your data ...

First: may be you want to edit your post and upload a text file or a Maple sheet instead

The only thing is to replace you omega... by sqrt(b), because it appears in deg=2 and deg=4 only

For the rest it seems you have a quite general polynomial of degree = 12 in x=_Z, parametric in b
and without a specific reason I would not expect to have it in much more simple form