CyclotomicField( n )
CyclotomicField( gens )
CyclotomicField( subfield, n )
CyclotomicField( subfield, base )
CyclotomicField
may be abbreviated CF
; it returns cyclotomic fields,
namely
CyclotomicField( n )
:
CyclotomicField( gens )
:
CyclotomicField( subfield, n )
:
CyclotomicField( subfield, base )
:base
field of the cyclotomic field
(see Coefficients for Number Fields).
subfield = 0
is equivalent to subfield = Rationals
.
gap> CF( 5 ); CF( [ EB(7), ER(3) ] ); CF( NF( [ ER(3) ] ), 24 ); CF(5) CF(84) CF(24)/NF(12,[ 1, 11 ]) gap> CF( CF(3), [ 1, E(4) ] ); CF(12)/CF(3)
A cyclotomic field record is a field record (see Field Records), in particular a number field record (see Number Field Records) that represents a cyclotomic field. Besides the obligatory record fields, a cyclotomic field record F contains the fields
isCyclotomicField
:true
; used by IsCyclotomicField IsCyclotomicField
,
zumbroichbase
:ZumbroichBase( n, m )
(see ZumbroichBase)
if F represents the
field extension Q_n/Q_m, and containing Zumbroichbase( n, 1 )
if F is an extension of a number field that is not cyclotomic;
Coefficients for Number Fields
GAP 3.4.4