报告题目:Modulo flows and Integer flows in long-barbell-free signed graphs
报告主讲人:西北工业大学陆由教授
报告时间:11月3日上午10:30-11:30
报告地点:腾讯会议:382-701-901
报告摘要:Converting modulo flows into integer-valued flows is one of the most critical steps in the study of integer flows. Tutte and Jaeger’s pioneering work shows the equivalence of modulo flows and integer-valued flows for ordinary graphs. However, such equivalence no longer holds for signed graphs. This motivates us to study how to convert modulo flows into integer-valued flows for signed graphs. In this talk, we show that the equivalence of modulo k-flows and integer-valued k-flows holds in long-barbell-free signed graphs for odd k≥3.
报告人简介:陆由,西北工业大学教授,博士生导师。2010年获中国科学技术大学博士学位;2014年赴美国西弗吉尼亚大学访学12个月。现担任陕西省工业与应用数学学会常务理事、中国工业与应用数学学会图论组合及应用专委会委员。从事图论研究,特别是子图覆盖、整数流、染色理论研究。先后主持国家自然科学基金项目3项,省自然科学基金项目2项;在J Combin Theory Ser B、J Graph Theory、SIAM J Discrete Math、European J Combin等期刊上发表学术论文近40篇,获陕西高等学校科学技术研究优秀成果一等奖1项(2/5),陕西省自然科学优秀学术论文二等奖1项、陕西省工业与应用数学学会青年优秀论文一等奖1项。