on the common index divisors of a dihedral field of prime degree
;Blair K. Spearman;Kenneth S. Williams;Qiduan Yang
structural engineering and mechanics2007Vol. 2007pp. -
95
spearman2007internationalon
Abstract
A criterion for a prime to be a common index divisor of a
dihedral field of prime degree is given. This criterion is used to determine
the index of families of dihedral fields of degrees 5 and 7.