Solution of the class number two problem for cyclotomic fields
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)].
scientific article; zbMATH DE number 3451949
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