1 citations · 1 across the 3 of their papers we have counts for
3 papers
math.CO2016
Complex Hadamard matrices attached to even orthogonal schemes of class 4
Takuya Ikuta, Akihiro Munemasa
A complex Hadamard matrix is a square matrix W with complex entries of absolute value 1 satisfying WW*=nI, where * stands for the Hermitian transpose and I is the identity matrix o…
math.CO2016
Transforming a matrix into a standard form
Akihiro Munemasa, Pritta Etriana Putri
We show that every matrix all of whose entries are in a fixed subgroup of the group of units of a commutative ring with identity is equivalent to a standard form. As a consequence,…
math.CO2014★ 1 cited
On the smallest eigenvalues of the line graphs of some trees
Akihiro Munemasa, Yoshio Sano, Tetsuji Taniguchi
In this paper, we study the characteristic polynomials of the line graphs of generalized Bethe trees. We give an infinite family of such graphs sharing the same smallest eigenvalue…