報(bào) 告 人:郭余寶 教授
報(bào)告題目:Quasi-vertex/arc-pancyclicities in multipartite tournaments
報(bào)告時間:2023年9月16日(周六)下午2:30
報(bào)告地點(diǎn):靜遠(yuǎn)樓1508學(xué)術(shù)報(bào)告廳
主辦單位:數(shù)學(xué)與統(tǒng)計(jì)學(xué)院、數(shù)學(xué)研究院、科學(xué)技術(shù)研究院
報(bào)告人簡介:
郭余寶教授現(xiàn)任亞琛工業(yè)大學(xué)信息處理數(shù)學(xué)研究所代理所長、德中高質(zhì)量發(fā)展研究院院長、曾任亞琛工業(yè)大學(xué)駐中國(北京)辦事處主任、德國“德中合作湯若望協(xié)會”副主席等職,是揚(yáng)州大學(xué)、東南大學(xué)、重慶大學(xué)、山西大學(xué)等高校的客座教授,曾入選山西省百人計(jì)劃。多年來,一直熱衷于中德兩國之間的學(xué)術(shù)和文化交流,促成亞琛工業(yè)大學(xué)與國內(nèi)多所院校建立友好校際關(guān)系。2022年4月任“江蘇省僑聯(lián)助夢大使”。
報(bào)告摘要:
A vertex (an arc, respectively) of a digraph D is called pancyclic, if it lies on a cycle of length t for all t 2 f3; : : : ; jV (D)jg. Moon (On subtournaments of a tournament. Canad. Math. Bull. 9, 1966) proved that every strong tournament is vertex-pancyclic and Alspach (On Cycles of each length in regular tournaments. Canad. Math. Bull. 10, 1967) con_rmed that every regular tournament is arcpancyclic.Since multipartite tournaments don't have the same vertex- and arc-pancyclicities as tournamnets, we have tried to extend the classical cycle concept to multipartite tourna-ments in various ways.
In this talk, we will give an overview of quasi x-pancyclicities, x 2 fp, l, o, nl, psg, and pandashcyclicity in multipartite tournaments, and leave a few open problems on this topic.