Báo cáo viên: Phạm Tiến Sơn (ĐH Đà Lạt)
Thời gian: 9h, Thứ 4 ngày 1 tháng 7 năm 2020
Địa điểm: Phòng 612, Nhà A6, Viện Toán học và qua GM https://meet.google.com/vha-ujbp-kwo
Tóm tắt: In this paper, we consider the problem of identifying the type (local minimizer, maximizer or saddle point) of a given isolated real critical point c, which is degenerate, of a multivariate polynomial function f. To this end, we introduce the definition of faithful radius of c by means of the curve of tangency of f. We show that the type of c can be determined by the global extrema of f over the Euclidean ball centered at c with a faithful radius. We propose algorithms to compute the faithful radius of c and determine its type. Joint work with Feng Guo. |
