# HOẠT ĐỘNG TRONG TUẦN

New results on stability and $L_ {\infty}$-gain analysis for positive linear differential-algebraic equations with unbounded time-varying delays
 Báo cáo viên: Nguyễn Hữu SáuThời gian: 9h, Thứ 5, ngày 11/4/2019Địa điểm: Phòng 513, Nhà A6, Viện Toán học, 18 Hoàng Quốc ViệtTóm tắt: This paper addresses the problems of stability and $L_ {infty}$ gain analysis for positive linear differential-algebraic equations with unbounded time-varying delays. First, we consider the stability problem of a class of positive linear differential-algebraic equations with unbounded time-varying delays. A new method, which is based on the upper bounding of the state vector by a decreasing function, is presented to analyze the stability of the system. Then, by investigating the monotonicity of state trajectory, the L ∞ -gain for differential-algebraic systems with unbounded time-varying delay is characterized. It is shown that the $L_ {infty}$-gain for differential-algebraic systems with unbounded time-varying delay is also independent of the delays and fully determined by the system matrices. A numerical example is given to illustrate the obtained results

### Tin tức nổi bật

 24/05/19, Hội nghị, hội thảo:THE INTERNATIONAL SUMMER SCHOOL "COMPLEX ANALYSIS AND APPLICATIONS" 27/05/19, Hội nghị, hội thảo:Quantum Topology and Hyperbolic Geometry 02/06/19, Hội nghị, hội thảo:Workshop "Tôpô và Hình học" 02/06/19, Hội nghị, hội thảo:International conferece Complex Analysis, Partial Differential Equations and their Applications 07/06/19, Bài giảng viện:Algebraic structures for topological summaries of data 22/07/19, Hội nghị, hội thảo:International Graduate Summer School in Mathematics 04/12/19, Hội nghị, hội thảo:Hội nghị Đại số-Lý thuyết số-Hình học và Tô pô 2019