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Staff Introduction
MATSUMOTO, Kohji / Guest Professor
I am interested in the behaviour of, and the mutual relations among zeta and Lfunctions. Using mainly the tools of function theory, Fourier analysis and probability theory, I am studying mean values and the valuedistribution of the classical Riemann zeta and Dirichlet Lfunctions, zetafunctions attached to algebraic or function fields, and automorphic Lfunctions. I have also studied the analytic continuation, functional equations etc. for multiple zetafunctions. I defined the notion of zetafunctions of root systems, which are multivariable generalizations of Witten zetafunctions. Recently I am studying, using the method of Lie theory, the properties of the zetafunction of each root system, and also the structure of the family of those functions.
Keywords  LFunctions, Multiple ZetaFunctions, Universality, Root Systems 

Faculty , Department  Faculty of Mathematics , Guest Professor (Nagoya University) 