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湖北省數學學會常務理事會2024年學術年會
2024-11-14 13:06:23 來源: 浏覽:

湖北省數學學會常務理事會2024年學術年會

3044澳门永利集团欢迎您 襄陽

2024111-113

報告簡介

報告一:Some Recent Progress in a Parabolic-Elliptic Keller-Segel System with Signal-dependent Motility

報告人:江傑 研究員  中國科學院

報告摘要:

In this talk, we would like to report our recent work on a Keller-Segel system of chemotaxis  featuring signal-dependent motility. We develop systematic new methods relying mainly on various comparison techniques to study the existence and boundedness problem. The talk is based on my recent joint works with Kentaro Fujie (Tohoku University), Philippe Laurençot (CNRS and University of Savoie Mont Blanc), Yanyan Zhang (ECNU), and Yamin Xiao (IAPCM).

報告人簡介:

江傑,中國科學院精密測量科學與技術創新研究院,研究員。主要研究趨化方程、相場-流體方程組等非線性發展方程整體解的适定性、有界性、漸近性、爆破解等相關問題。目前在CPDECVPDEJDESIMANonlinearity 等國際數學刊物正式發表SCI論文 31 篇,3 篇入選 ESI 高被引論文,1 篇論文同時入選 ESI 熱點論文。獲得2021年度中國科學院精密測量院突出科技成果獎,2023 年湖北省工業與應用數學學會優秀青年學者獎。主持國家自然科學基金面上項目、青年基金、湖北省自然科學基金面上項目等課題。

 

報告二:Involutions over Finite Fields

報告人:鄭大彬 教授  湖北大學

報告摘要:

An involution over finite fields is a permutation polynomial whose inverse is itself. Owing to this property, involutions over finite fields have been widely used in applications such as cryptography and coding theory. As far as we know, there is no systematic way to construct involutions and are only few explicit involutions over finite fields. In this talk, we propose two methods to construct involutions and obtain lots of explicit involutions over finite fields. The first one is to construct involutions of the form $x^rh(x^\frac{q-1}{d})\in F_q[x] by solving congruence equations over finite fields. The second one is to construct involutions from 2-to-1 mappings over finite fields. Moreover, the involutions derived from 2-to-1 mappings have no fixed points.

報告人簡介:

鄭大彬,湖北大學數學與統計學學院教授、博士生導師、院長,中國工業與應用數學學會編碼密碼及相關理論專業委員會委員、中國數學會計算機數學專業委員會委員。20066月于中科院數學與系統科學研究院獲博士學位,20096月至20124月在中科院信息安全國家重點實驗室從事博士後研究工作,20153月至20162月在美國特拉華大學訪問、學習。先後主持國家自然科學基金項目4項、國家重點研發計劃子課題1項以及省部級項目多項。在《IEEE Transactions on Information Theory》、《Design, Codes and Cryptography》、《Finite Fields and Their Applications》、《Discrete Mathematics》、《Cryptography and Communications》、《SCIENCE CHINA Mathematics》等國内外學術期刊和國際會議上發表論文50多篇。曾獲得第31屆國際符号與代數計算(ISSAC2006)年會傑出論文獎。

 

報告三:On the size, spectral radius, distance spectral radius and fractional matchings in graphs

報告人:張敏捷 教授  3044澳门永利集团欢迎您

報告摘要:

In this paper, we first establish a lower bound on the size (resp. the spectral radius) of a graph $G$ to guarantee that the graph $G$ contains a fractional perfect matching. Then we determine an upper bound on the distance spectral radius of graph $G$ to ensure that the graph $G$ has a fractional perfect matching. Furthermore, we construct some extremal graphs to show all the bounds obtained in this contribution are the best possible.

報告人簡介:

張敏捷,3044澳门永利集团欢迎您3044澳门永利集团欢迎您教授,碩士生導師,美國《數學評論》評論員。研究方向:代數圖論與組合數學。主持、參與多項教學與科研項目,其中主持國家自然科學青年基金1項。在Discrete Math., Discrete Appl. Math., Finite Fields Appl., Appl. Math. Comput.等期刊發表學術論文近30篇,1 篇入選 ESI 高被引論文,出版學術專著1部。

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