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Mathematics of Computation
Mathematics of Computation
ISSN 1088-6842(online) ISSN 0025-5718(print)


Some singular moduli for $ {\bf Q}(\sqrt 3)$

Authors: Harvey Cohn and Jesse Deutsch
Journal: Math. Comp. 59 (1992), 231-247
MSC: Primary 11R37; Secondary 11F41
MathSciNet review: 1134721
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Abstract: In an earlier paper in this journal, the authors derived the equations which transform the Hilbert modular function field for $ {\mathbf{Q}}(\sqrt 3 )$ when the arguments are multiplied by $ (1 + \sqrt 3 ,1 - \sqrt 3 )$. These equations define a complex $ {V_2}$, but we concentrate on special diagonal curves on which the values of some of the singular moduli can be evaluated numerically by using the "PSOS" algorithm. In this way the ring class fields can be evaluated for the forms $ {\xi ^2} + {2^t}A{\eta ^2}$, where $ A = 1,2,3,6$ and $ t > 0$. These last results are based partly on conjectures supported here by numerical evidence.

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PII: S 0025-5718(1992)1134721-6
Keywords: Hilbert modular functions, modular equations, singular moduli, class field theory
Article copyright: © Copyright 1992 American Mathematical Society

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