一、报告题目：The maximum signless Laplacian spectral radius of graphs without 2

二、报告人：王力工 教授

三、时 间：2024年7月6日(周六) 上午 10:00-11:00

四、地  点：闻理园A4-216

报告摘要：For a given , a graph is said to be -free if it does not contain as a subgraph. We use 2 to denote the disjoint union of two triangles. In spectral extremal graph theory, it is interesting to determine the maximum (signless Laplacian) spectral radius of -free graphs. In this talk, we introduce some new results about the maximum (signless Laplacian) spectral radius of -free graphs. We also characterize the unique extremal graph with the maximum signless Laplacian spectral radius among all 2-free graphs of order n ≥ 44. This is a joint work with Yanting Zhang.

报告人简介：王力工，西北工业大学教授、博士生导师，荷兰Twente大学博士，研究方向为图论及其应用，主要研究包括：图谱理论，有向图与超图的谱性质，整图的刻画，图的Turán数，图的Gallai-Ramsey数等，主持国家自然科学基金多项，在《Journal of Graph Theory》、《Discrete Mathematics》、《Discrete Applied Mathematics》、《Electronic Journal of Combinatorics》、《Linear Algebra and its Applications》等国内外重要学术期刊发表SCI论文120多篇。

欢迎广大师生参加！联系人：王狄建、龚世才