15.1 IsNumberField

IsNumberField( obj )

Field Records) of a field of characteristic zero where F.generators is a list of cyclotomics (see chapter Cyclotomics), and false else.

    gap> IsNumberField( CF(9) ); IsNumberField( NF( [ ER(3) ] ) );
    true
    true
    gap> IsNumberField( GF( 2 ) );
    false

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