Hi,

I'm using version 4b5, and here's the problem I'm having:

gap> x:=Indeterminate(Rationals,"x");
x
gap> a:=AlgebraicExtension(Rationals,x^4-2*x^2+9);
<field in characteristic 0>
gap> RootOfDefiningPolynomial(a);
Error no method found for operation RootOfDefiningPolynomial at
Error( "no method found for operation ", name );
<function>( <arguments> ) called from read-eval-loop
Entering break read-eval-print loop, you can 'quit;' to quit to outer loop,
or you can return to continue
brk>

Any ideas?

Thanks

Igor