11 citations · 20 across the 35 of their papers we have counts for
47 papers
Adelic framed form class groups and explicit class field theory
Ja Kyung Koo, Dong Hwa Shin, Dong Sung Yoon
Let be a negative discriminant, and let . Let denote the set of primitive positive definite binary quadratic forms over of…
On the integrality of modular functions over and Kronecker-type congruences
Ho Yun Jung, Ja Kyung Koo, Dong Hwa Shin
Let be a positive integer and let be a meromorphic modular function of level with rational Fourier coefficients. For a prime , define a function on the complex…
A simplified algorithmic realization of Galois actions on special values of modular functions
Ja Kyung Koo, Dong Hwa Shin, Dong Sung Yoon
We propose an explicit and practical algorithm for computing Galois conjugates and irreducible polynomials for special values of modular functions evaluated at CM points associated…
Inverse limits of CM points on certain Shimura varieties
Ho Yun Jung, Ja Kyung Koo, Dong Hwa Shin
Let be a positive integer, and let or $1\Mod{4}$ be a negative integer. We define the sets and as subsets…
Gauss's form class groups and Shimura's canonical models
Ja Kyung Koo, Dong Hwa Shin, Dong Sung Yoon
Let be a positive integer and be a subgroup of containing . Let be an imaginary quadratic field and be an order of dis…
Class fields and form class groups for solving certain quadratic Diophantine equations
Ho Yun Jung, Ja Kyung Koo, Dong Hwa Shin +1
Let be an imaginary quadratic field and be an order in . We construct class fields associated with form class groups which are isomorphic to certain $\mathcal{…