期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：2007
卷号：2007
DOI：10.1155/2007/89713
出版社：Hindawi Publishing Corporation
摘要：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.
