2006

Date : March 7 (Wed) 16:30 - 18:00

Place : B707 Math. Dept., Fac. Sci., Hiroshima University

Speaker : Masayo FUJIMURA (National Defense Academy)

Title : The moduli space of polynomial maps and surjectivity of multiplier representation

Date : February 9 (Fri) 16:30 - 18:00

Place : B707 Math. Dept., Fac. Sci., Hiroshima University

Speaker : Haseo Ki (Yonsei Univ.)

Title : The zeros of the derivative of the Riemann zeta function near the critical line

Abstract:

We study the horizontal behavior of zeros of the derivative of the Riemann zeta function near the critical line. We reformulate the Soundararajan's conjecture. We also give an equivalent condition that zeros of the derivative of the Riemann zeta function are arbitrarily close to the critical line.

Date : November 29 (Wed) 16:30 - 18:00

Place : B707 Math. Dept., Fac. Sci., Hiroshima University

Speaker : Tomoki KAWAHIRA (Nagoya Univ.)

Title : Simultaneous linearization and its application to complex dynamics

Date : September 28 (Thu) 15:00 - 16:30

Place : C808 Fac. Integrated Art Sci, Hiroshima University

Speaker : Makoto MASUMOTO (Yamaguchi Univ.)

Title : Once-holed tori embedded in Riemann surfaces

Date : July 14 (Fri) 15:00 - 18:00

Place : B702 Math. Dept., Fac. Sci., Hiroshima University

15:00 - 16:10

Speaker : Galina Filipuk (Kumamoto Univ.)

Title : On middle convolution for Fuchsian systems

Abstract:

Middle convolution is an operation for Fuchsian systems of differential equations which preserves rigidity (and, hence, the number of accessory parameters) but changes the rank and monodromy group. In the talk I explain the algorithm of Dettweiler and Reiter who generalized the Katz middle convolution functor. The sixth Painleve equation describes monodromy preserving deformations of the rank 2 Fuchsian system with four singularities on the projective line. The Okamoto birational transformation can be derived after applying the algorithm. Finally I briefly discuss the invariance of deformation equation under middle convolution based on joint work with Y.Haraoka.

16:30-18:00

Speaker : Kouichi TAKEMURA (Yokohama City University)

Title : Heun equation and Darboux transformation