72 citations · 873 across the 61 of their papers we have counts for
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Spatially Resolved HCN Absorption Features in the Circumnuclear Region of NGC 1052
Satoko Sawada-Satoh, Duk-Gyoo Roh, Se-Jin Oh +7
We present the first VLBI detection of HCN molecular absorption in the nearby active galactic nucleus NGC 1052. Utilizing the 1 milliarcsecond resolution achieved by the Korean VLB…
The number of ideals of containing with given index
Mitsugu Hirasaka, Semin Oh
It is well-known that a connected regular graph is strongly-regular if and only if its adjacency matrix has exactly three eigenvalues. Let denote an integral square matrix and…
Association schemes all of whose symmetric fusion schemes are integral
Mitsugu Hirasaka, Kijung Kim, Semin Oh
In this paper we aim to characterize association schemes all of whose symmetric fusion schemes have only integral eigenvalues, and classify those obtained from a regular action of…
Twisted Coxeter elements and Folded AR-quivers via Dynkin diagram automorphisms:II
Se-Jin Oh, UhiRinn Suh
As a continuation of the previous paper, we find a combinatorial interpretation of Dorey's rule for type via twisted Auslander-Reiten quivers (AR-quivers) of type ,…
Twisted Coxeter elements and folded AR-quivers via Dynkin diagram automorphisms: I
Se-jin Oh, UhiRinn Suh
We introduce and study the twisted adapted -cluster point and its combinatorial Auslander-Reiten quivers, called twisted AR-quivers and folded AR-quivers, of type whi…
Catalan triangle numbers and binomial coefficients
Kyu-Hwan Lee, Se-jin Oh
The binomial coefficients and Catalan triangle numbers appear as weight multiplicities of the finite-dimensional simple Lie algebras and affine Kac--Moody algebras. We prove that a…