Multiplicity-free representations and visible actions on complex manifolds Toshiyuki Kobayashi (RIMS, Kyoto University) Symposium on Representation Theory 2005 Kakegawa, Shizuoka November 15 - 18, 2005 1) 2) [1] Multiplicity-free theorem in branching problems of uni- tary highest weight modules, Proc. Symposium on Rep- resentation Theory held at Saga, Kyushu 1997 (ed. K. Mimachi), (1997), 9–17. [2] Multiplicity one theorem in the orbit method (with Nas- rin), in memory of Karpelevic “Lie Groups and Symmet- ric Spaces”, (eds. S. Gindikin), 161–169 Amer. Math. Soc. 2003 [3] Geometry of Multiplicity-free representations of GL(n), visible actions on flag varieties, and triunity, Acta Appl. Math. 81 (2004), 129-146. [4] Multiplicity-free representations and visible actions on complex manifolds, Publ. RIMS 41 (2005), 497-549. 表現論シンポジウム講演集,2005 pp.33-63 - 33 -