most citedButson-type complex Hadamard matrices and association schemes on Galois rings of characteristic 4

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math.AG2023★ 1 cited

Canonical coordinates for moduli spaces of rank two irregular connections on curves

Arata Komyo, Frank Loray, Masa-Hiko Saito +1

In this paper, we study a geometric counterpart of the cyclic vector which allow us to put a rank 2 meromorphic connection on a curve into a ``companion'' normal form. This allow u…

math.CO2017★ 1 cited

Butson-type complex Hadamard matrices and association schemes on Galois rings of characteristic 4

Takuya Ikuta, Akihiro Munemasa

We consider nonsymmetric hermitian complex Hadamard matrices belonging to the Bose-Mesner algebra of commutative nonsymmetric association schemes. First, we give a characterization…