The Concept of Dynamical Reduction in Nonlinear Science 蔵本由紀先生（Prof. Yoshiki Kuramoto）国際高等研究所副所長 International Institute for Advanced Studies 1 月 20 日（火）16：30〜18：00 京都大学医学・生命科学総合研究棟（Ｇ棟）２階講義室セミナー室 A（Bldg. G, Rm. A） The concept of dynamical reduction, simply called “reduction” below, plays Graduate School of Biostudies a central role in the understanding of complex dynamical behavior exhibited by various natural and man-‐made nonlinear systems. In order to give the feeling of how this is actually so, I will first present a small part of my recollection of my own research activity around the mid seventieth of the last century when I first stepped into this field of science,. Actually, in those days I was unconsciously led to the idea of reduction in the attempt of mathematically explaining the curious self-‐organized patterns developing in a chemical reaction called the Belousov-‐Zhabotinsky reaction. In the latter part of this talk, further evidence of how the reduction idea works powerfully will be provided by focusing on a universal class of phenomena called synchronization, which has been the subject of my utmost concern over the last few tens years. Finally, a few remarks will be given on the significance of reduction from a more general point of view. 連絡先細胞周期学分野石川冬木 (内線) 4195 The talk will be given in English for a doctoral course class of “Frontier in Life Sciences”, but general audience is very welcome.