Polyhedra, functional analysis and approximation theory

Người báo cáo: David Yost (Federation University Australia)

Time: 9:00 - 10:00 AM, October 24th, 2023 (Tuesday)

Location: Room 612, building A6, Institute of Mathematics (18 Hoang Quoc Viet, Cau Giay, Hanoi)

Abstract: This talk will focus on some combinatorial properties of polytopes (a polytope is the convex hull of a finite set). For example, given natural numbers d, v, e, is there a d-dimensional polytope with v vertices and e edges? Surprisingly perhaps, this is impossible if 2e-dv lies in either of the intervals [1,d-3] or [d+3,2d-7].

Our interest in polytopes originally arose from a problem about approximation in Banach spaces. We will begin by briefly outlining this history, demonstrating the underlying unity of different branches of mathematics.

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Xuất bản mới
Trần Quang Hóa, Đỗ Trọng Hoàng, Le Van Dinh, Nguyễn Đăng Hợp, Thái Thành Nguyễn, Asymptotic depth of invariant chains of edge ideals, Journal of Combinatorial Theory, Series A Volume 224, November 2026, 106221 .
Nguyễn Duy Tân, Nguyễn Quốc Thắng, On fields with Serre's property (F) and the finitude of Galois and flat cohomology of algebraic groups over fields, Ars Mathematica Contemporanea, v. 26 (2026), No. 3 .
Tan H. Cao, Boris S. Mordukhovich, Dao Nguyen, Trang Nguyen, Nguyễn Năng Thiều, Optimal control of nonconvex sweeping processes with variable time via finite-difference approximations, Nonlinear Analysis: Hybrid Systems Volume 61, August 2026, 101755 .