[GAP Forum] Sqrt for the cyclotomic numbers

[Alexander Hulpke]

Dear Forum,

> On Jan 19, 2015, at 1/19/15 2:18, Palcoux Sebastien <sebastienpalcoux at yahoo.fr> wrote:
> 
> Hi,
> Is it possible to extend the function Sqrt on the cyclotomic numbers?

How would you represent this root? In general the square root of a cylotomic is not cyclotomic again. (You could form a formal AlgebraicExtension, but then you lose the irrational cyclotomics for operations.)

Regards,

   Alexander Hulpke