On a ratio between relative class numbers.
On the class numbers of cyclotomic fields.
Trace formulae and imaginary quadratic fields.
CM-fields with all roots of unity
On CM-fields with the same maximal real subfield
The existence of certain infinite families of imaginary quadratic fields.
CM-fields and exponents of their ideal class groups
Relations among certain number knots
The narrow class groups of some ℤₚ-extensions over the rationals
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