Algebraic Combinatorics
Conference at RIMS, Kyoto University
March 9-11, 1998
Room 420, Research Institute for Mathematical Sciences (RIMS)
Kyoto University
Kyoto, Japan
Organized by Akihiro Munemasa
munemasa@math.kyushu-u.ac.jp
Program (last updated February 5, 1998)
Monday, March 9, 1998
9:30--10:30
Hendrik Van Maldeghem (Univ. Ghent)
Groups and generalized polygons
10:40--11:40
Satoshi Yoshiara (Osaka Kyoiku Univ.)
Extended generalized quadrangles
13:20--13:50
Chihiro Suetake (Amagasaki Minami High School)
On projective planes of order 15
admitting a collineation of order 7
14:00--14:20
Hitoshi Kaneta (Okayama Univ.)
A 72-arc associated to the A_6-invariant sextic
14:30--14:50
Hiroaki Taniguchi (Hyogo Univ. Teacher Education)
On embeddings of projective spaces
15:10--15:50
Masato Sawabe (Kumamoto Univ.)
On 2-radical subgroups of the Conway group Co_1
16:00--16:40
Mariko Hagita (Keio Univ.)
Difference sets in generalized quaternion groups
16:50--17:10
Tsuyoshi Atsumi(Kagoshima Univ.)
A note on equalities in group algebras and character values
Tuesday, March 10, 1998
9:30--10:30
Hans Cuypers (Eindhoven Tech. Univ.)
Linear groups generated by transvections
10:40--11:40
John van Bon (Calabria Univ.)
Distance-transitive graphs
13:20--14:20
Jack Koolen (Kyushu Univ.)
On tight distance-regular graphs
14:30--15:10
Nobuo Nakagawa (Kinki Univ.)
The second neighbourhoods of the antipodal double covers of
strongly regular graphs with the parameters (k,0,2)
and some 6-class association schemes
15:30--15:50
Masato Tomiyama (Osaka Kyoiku Univ.)
Weakly Q-polynomial distance-regular graphs
16:00--16:20
Hiroshi Suzuki (International Christian Univ.) and Masao Kiyota
(Tokyo Med. & Dent. Univ.)
Character products and Q-polynomial group association
schemes
16:30--17:10
Sachiyo Terada (Osaka Kyoiku Univ.)
A family of pairs of non-isomorphic group association schemes
with same intersection numbers
Wednesday, March 11
9:30--10:30
Masahiko Miyamoto (Univ. Tsukuba)
Applications of representations of code vertex operator algebras
10:40--11:40
Brian Curtin (Kyushu Univ.)
Quantum enveloping algebras and associations schemes
13:20--14:20
Kazumasa Nomura (Tokyo Med. & Dent. Univ.)
On modular invariance equations
14:30--14:50
Mitsuhiro Sawano (Kyushu Univ.) and Etsuko Bannai (Kyushu Univ.)
On 4-weight spin models constructed from matrices of Potts type
or cyclic type
15:10--15:30
Mitsugu Hirasaka (Kyushu Univ.)
On characterization of primitive commutative association schemes
by a nonsymmetric relation with small valency
15:40--16:00
Toshihiro Kumada (Keio Univ.)
Isometric embeddings of metric Q-vector spaces
into Q^N
16:10--16:30
Shigeru Kobayashi (Naruto Kyoiku Univ.)
The submanifold of self-dual codes in a Grassmann manifold
16:40--17:00
Manabu Ohura (Kyushu Univ.), Eiichi Bannai (Kyushu Univ.),
Masaaki Harada (Yamagata Univ.) and Steven Dougherty (Univ. Scranton)
Type II codes, even unimodular lattices and invariant rings