an:03451949
Zbl 0288.12005
Masley, John Myron
Solution of the class number two problem for cyclotomic fields
EN
Invent. Math. 28, 243-244 (1975).
00139765
1975
j
11R29 11R18 11R42
It is shown that the only cyclotomic fields of the form \(\mathbb Q(e^{2\pi i/m})\) which have class number two are \(\mathbb Q(e^{2\pi i/39})\) and \(\mathbb Q(e^{2\pi i/56})\). Methods are the same as used in solving the class number one problem [the author and \textit{H. L. Montgomery}, J. Reine Angew. Math. 286/287, 248--256 (1976; Zbl 0335.12013)].
John Myron Masley
Zbl 0335.12013