· University of
Sabitier, Toulouse, France, Jan. , 1999.
· Oklahoma
State University, Mar. , 1999.
· Hong Kong
University, June, 1999.
· Hong Kong
Batist University, June, 1999.
· Ohio
University, Sept., 1999;
.
15. SU(4)
theory for spin systems with orbital degeneracy.
· ETH-Zurich,
Switzerland, July, 1998.
· University of
Sabatier, Toulouse, France, Feb. , 1999.
· Oklahoma
State University, Mar. , 1999.
16. Strongly
correlated electrons in condensed matter.
· Fudan Univ.,
China, June, 2000.
17. Magnetic
systems with orbital degree of freedom.
· Advanced
Study Center, Tsinghua Univ., Beijing, China, July, 2000;
· ICTP,
Treiste, Italy, August, 2001.
18. fractional
and composite particles in condensed matter.
· Institute of
Theoretical Physics, Academic Sinica, Beijing, China, Dec., 2001.
· Zhejiang
Univ., China, Dec., 2001.
· Hong Kong
Univ., Dec., 2001.
19. Theory of
excitons in insulating copper oxides.
· Univ. of
Southern California, USA, April 12, 2002.
20. Gossamer
superconductivity.
· Los Alamos
National Laboratory, Sept. 9, 2002.
· The
University of Hong Kong, Nov. 22, 2002.
· Institute of
Theoretical Physics, Chinese Academy of Sciecnes, Beijing, China, Nov.
26,
2002.
· Center for
Theoretical Sciences, Hsinchu, Taiwan, Nov. 29, 2002.
· University of
Michigan, Ann Arbor, Feb. 11, 2003.
· University of
Sherbrook, Canada, May 9, 2003.
· University of
Cincinnati, June 2, 2003.
· Zhejiang
University, Hangzhou, Zhejiang, China, July 19, 2003.
· Institute of
Physics, Chinese Academy of Sciences, Beijing, China, July 25,
2003.
21. Carbon
nanotubes and ladder Systems.
· Center for
Condensed Matter Materials, Taiwan University, Taiwan, March, 2003.
22. Wonderful
World of Spins.
· Department of
Physics, Taiwan University, Taiwan, March, 2003.
23. Plain
vanilla version of RVB theory for high Tc superconductivity.
· Hong Kong
University of Science and Technology, Sept., 2003.
· Fudan
University, Shanghai, China, Oct., 2003.
· Center for
Theoretical Sciences, Hsinchu, Taiwan, Nov. , 2003
11