D. Yoon

activity

20102026

x_{1}^{2} + 2 x_{2}^{2} + x_{3}^{2} + x_{4}^{2} + x_{1} x_{3} + x_{1} x_{4} + x_{2} x_{4}

1 citations · 3 across the 15 of their papers we have counts for

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Showing 2015 · math.NTShow all

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math.NT2015

On Siegel invariants of certain CM-fields

Ja Kyung Koo, Gilles Robert, Dong Hwa Shin +1

We first construct Siegel invariants of some CM-fields in terms of special values of theta constants, which would be a generalization of Siegel-Ramachandra invariants of imaginary…

math.NT2015

Generators of the ring of weakly holomorphic modular functions for $Γ_{1} (N)$

Ja Kyung Koo, Dong Sung Yoon

For a positive integer $N$ divisible by $4, 5, 6, 7$ or $9$ , let $O_{1, N} (Q)$ be the ring of weakly holomorphic modular functions for the congruence subgroup $Γ_1(N…

On Siegel invariants of certain CM-fields

Generators of the ring of weakly holomorphic modular functions for Γ1​(N)

Generators of the ring of weakly holomorphic modular functions for $Γ_{1} (N)$