Honorary Member

Shin'ichi Oishi

Shin'ichi Oishi  Professor Oishi graduated from the Department of Electronics and Communication, Faculty of Science and Engineering, Waseda University, in March 1976. He completed his doctorate in the Department of Electric Engineering at Graduate School of Science and Engineering of the same university and received a Ph.D. in 1981. He became an assistant in April 1980, a lecturer in June 1982, an associate professor in April 1984, and a professor in April 1989 at the same university. He currently belongs to the Department of Applied Mathematics, Faculty of Science and Engineering of the same university.
   In his doctoral thesis, he showed that the general solution of solitons can be expressed by the Fredholm determinant through bilinear form and developed a nonlinear Fourier analysis method for soliton systems. After obtaining his Ph.D degree, he developed solution methods for nonlinear equations using the homotopy method, especially the homotopy method for infinite dimensional equations. In the form of developing such computer-assisted proof methods, he has consistently been engaged in research on numerical calculation with guaranteed accuracy since 1990. He has developed a method for demonstrating the existence of solutions to differential equations by numerical calculation with guaranteed accuracy using the convergence theorem of the infinite dimensional Newton method. In addition, he spent 30 years building a numerical calculation system so that numerical calculation with guaranteed accuracy became the basic idea of numerical calculation. For example, for many linear problems, it has been shown that a numerical solution with guaranteed mathematical correctness can be obtained with several times the effort of approximate calculation. In the process, he developed the Error Free Transformation method that can improve accuracy adaptively at high speed according to the difficulty of the problem. Moreover, by the development of numerical calculation with guaranteed accuracy method in this way, a computer-assisted analysis method for nonlinear ordinary differential equations, nonlinear delay differential equations, and nonlinear partial differential equations have been developed, and computer-assisted analysis methods for various nonlinear equations appearing in science and engineering have been developed. He also contributes greatly to the development of computational engineering, such as in the development of computational geometry algorithms with guaranteed accuracy. Even in the field of pure mathematics, the hyperbolic decision algorithm for classification problems of three-dimensional manifolds, which was developed by Professor Oishi et al., is now widely used. In this way, he has made a great contribution to the establishment of numerical calculation with guaranteed accuracy.
   For these achievements, he was awarded Best Paper Award (four times including an Inose Award, which is the predecessor of IEICE Paper of the Year), Achievement Award and Distinguished Achievement and Contributions Award by IEICE. He is also a fellow. He was awarded the Best Paper Award, Best Author Award, and Achievement Award by the Japan Society for Industrial and Applied Mathematics. From other groups, he was awarded the Okawa Publications Prize, the Funai Information Science Promotion Award, the Telecommunications Foundation Telecom Systems Technology Award, and the Niwa Memorial Award. By Waseda University, he was awarded VASEDA VNIVERSITAS/PALMA IN MEMORIAM AZVSAONO and Okuma Academic Commemorative Prize. He also received the Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology and the Purple Ribbon. At the IEICE, he served as Vice President, Editor-in-Chief of IEICE Transactions on A (Japanese Edition), President of the IEICE Engineering Sciences Society and Director of Services Planning and Educational Affairs.
   He taught more than 400 undergraduate and graduate students, including more than 20 doctors, in educational activities at Waseda University's laboratory, and contributed to the fostering of many younger people. He has also contributed to academia by writing more than 10 books such as "Fourier Analysis " (Iwanami Shoten, Publishers.), "Numerical Calculation with Guaranteed Accuracy" (Corona Publishing Co., Ltd.), and "Introduction to Nonlinear Analysis" (Corona Publishing Co., Ltd.).
   As mentioned above, his outstanding contribution to the development of the basics of the electronic information and communication field, both in research and education and in social contribution, is extremely remarkable, and we recommend him as an IEICE Honorary Member.
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