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math.NT2025
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…
math.NT2025
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…