Class numbers of real quadratic number fields

Brown, Ezra

doi:10.1090/S0002-9947-1974-0364172-9

Class numbers of real quadratic number fields
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Trans. Amer. Math. Soc. 190 (1974), 99-107 Request permission

Abstract:

This article is a study of congruence conditions, modulo powers of two, on class number of real quadratic number fields $Q(\sqrt d )$, for which d has at most three distinct prime divisors. Techniques used are those associated with Gaussian composition of binary quadratic forms.

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