* 구분 : 수학과 특강

* 일시 : 2022년 4월 28일 (목), 17시-18시

* 장소 : (오프라인) 종합과학관 A동 317호 / (온라인) ZOOM link : https://ewha.zoom.us/j/87337927416

* 연사 : 이준경 (한양대학교)

* 강연 제목 : Recent developments on graph norms

* 초록 : For any given graph $H$, one may define a natural corresponding functional $\|.\|_H$ for real(or complex) valued functions by using homomorphism density. We say that $H$ is \emph{norming} if $\|.\|_H$ is a norm. This generalises the Gowers octahedral norms, a widely used tool in extremal combinatorics to quantify quasirandomness. In 2008, Lovász asked to determine what graphs are norming. For the recent few years, there have been interesting developments on the Lovász question, where algebraic combinatorics, extremal graph theory and functional analysis meet. In this talk, I will discuss some of the progress. Based on joint work with David Conlon, Jan Hladk\'{y}, Frederik Garbe, Bjarne Sch\"{u}lke, and Sasha Sidorenko.