K. Momihara

activity

20122025

most citedCameron-Liebler Line Classes with parameter

x = \frac{( q + 1 ) ^{2}}{3}

13 citations · 61 across the 31 of their papers we have counts for

collaborators

Showing 2019Show all

2 papers · 1 filter

math.CO2019

A new family of Hadamard matrices of order $4 (2 q^{2} + 1)$

Ka Hin Leung, Koji Momihara, Qing Xiang

Let $q$ be a prime power of the form $q = 12 c^{2} + 4 c + 3$ with $c$ an arbitrary integer. In this paper we construct a difference family with parameters $(2 q^{2}; q^{2}, q^{2}, q^{2}, q^{2} - 1; 2 q^{2} - 2)$ …

math.CO2019

Generalized constructions of Menon-Hadamard difference sets

Koji Momihara, Qing Xiang

We revisit the problem of constructing Menon-Hadamard difference sets. In 1997, Wilson and Xiang gave a general framework for constructing Menon-Hadamard difference sets by using a…

A new family of Hadamard matrices of order 4(2q2+1)

Generalized constructions of Menon-Hadamard difference sets

A new family of Hadamard matrices of order $4 (2 q^{2} + 1)$