2016 Volume 68 Issue 2 Pages 899-915
Let l be the prime 3,5 or 7 and let m be a nonzero integer. We give a method for constructing an infinite family of pairs of quadratic fields ℚ(√D) and ℚ(√(mD)) with both class numbers divisible by l. Such quadratic fields are parametrized by rational points on a specified elliptic curve.
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