Workshop in Algebra and Discrete Mathematics

Jointly organized by

Department of Mathematics, CUHK

Chung Chi College, CUHK

and Peking University


27 - 31 March 2000

Organizing Committee

K.P. Shum (The Chinese University of Hong Kong)
S.H. Hou (Hong Kong Polytechnic University)
S.P. Lam (The Chinese University of Hong Kong)
Li Jian Shu (Hong Kong University of Technology of Science)
Feng Yun (Wuhan University)
Xu Mingyao (Peking University)
Zhang Jiping (Peking University)

The workshop is co-sponsored by

For Further Information, please contact

Mr. Xue-Ming Ren or Mr. Xiu-Yun Guo
Department of Mathematics
The Chinese University of Hong Kong
Telephone: 2609 7962   Fax: 2603 5154
Email: or

All Interested Are Welcome!


Date: 29 March 2000 (Wednesday)
Venue: LG204, Wen Lan Tang, Shaw College
Chairman Polly Sy University of Philippines 
9:00 - 9:30 Zhirang Zhang Chengdu Institute of Meteorology, Chengdu 
The locally solvable radical of torsion groups 
9:30 - 10:00 Chia Hsin Liu National Sun Yat-Sen University, Kaohsiung 
Groups identities on units rings 
10:00 - 10:30 Tea Break
Chairman Yun Fang Wuhan University, Wuhan 
 10:30 - 11:30 Beifang Chen Hong Kong University of Science and Technology 
Lattice points, Dedekind sums, and Ehrhart polynomials 
11:30 - 12:00 Yanming Wang Zhongshan University, Guangzhou 
On diameter of Cayley graphs 
12:00 - 1:00 Jingsong Huang Hong Kong University of Science and Technology 
Polynomial Invariants, differential operators and eigenspace representations 

There is no seminars held on the afternoon session on 29 March 2000!

Date: 30 March 2000 (Thursday)
Morning Session: C1, T.C. Cheng Building, United College
Chairman Xiaofeng Wang Shenzhen University, Shenzhen 
9:00 - 9:30 Xilin Tang Guangzhou Teacher's College, Guangzhou 
Biordered sets of regular semigroups with inverse transversals 
9:30 - 10:00 Larry Xue Bradley University, USA 
On center Galois extensions of rings 
10:00 - 10:30 Tea Break
Chairman M. Tokizawa Chuo University, Japan 
10:30 - 11:00 Xiuyun Guo The Chinese University of Hong Kong 
11:00 - 11:30 Xiaojiang Guo Yunnan University, Kunming 
Idempotent-connected abundant semigroups which is the disjoint union of quasi-ideal adequate transversals 
Chairman A.A. Mikhalev University of Hong Kong 
11:35 - 12:05 K.I. Beidar National Cheng-Kung University, Taiwan 
On additive isomorphisms of prime rings preserving polynomials 
12:10 - 12:40 Srichan Arworn Chiangmai University, Thailand 
Complete sublattices of a given complete lattice 
12:45 - 2:00 Lunch Break 

Date: 30 March 2000 (Thursday)
Afternoon Session: L2, Science Centre
Chairman Xingdong Liu Xijiang University, Guangzhou 
2:15 - 2:45 Ronghua Zhang Yunnan University, Kunming 
A note on quasi-C-semigroups 
2:50 - 3:20 Yuqun Chen South China Normal University, Guangzhou 
Projective S-acts and exact functors 
3:20 - 4:00 Nittiya Pabhapote University of Chamber of Commerce, Thailand 
Some characterizations of completely multiplicative functions 
4:00 - 4:30 Tea Break
Chairman N.H. Lam Hanoi Institute of Mathematics, Vietnam 
4:30 - 5:30 Jiping Zhang Beijing University, Beijing 
On the complexity of modules 
6:30 Farewell Dinner Party (Place to be announced) 

Date: 31 March 2000 (Friday)
Venue: B6, Ho Tim Building, Chung Chi College
Chairman M.K. Sen Calcutta University, India 
9:00 - 9:30 Y. Fong National Cheng-Kung University, Taiwan 
On derivations of transformation near-rings 
9:30 - 10:00 K.P. Shum The Chinese University of Hong Kong 
On Super-Hamiltonian Semigroups 
10:00 - 10:30 Tea Break
10:30 - 11:00 Discussion for all participants: Further Activities and co-operations in the region 
Panel: Mingyao Xu Jiping Zhang (Chairman) 
Yanming Wang Do Long Van
M.K. Sen Y. Fong
Qasier Mushtaq K.P. Shum
Jianshu Li M. Tokizawa
A.A. Mikhalev Polly Sy
W. Hemakul Zhang Zhirang
11:00 Closing Ceremony

Other Informations>Department of Mathematics, The Chinese University of Hong Kong

Chung Chi College, The Chinese University of Hong Kong