报告时间：2017年4月18日14:30

报告地点：数理与信息工程学院一楼报告厅

报告人1：胡晓雪

报告题目：Entire  chromatic number of 2-connected plane graphs

报告摘要：A  plane graph  is  entirely -colorable  if can  be colored with k colors such that any two adjacent or incident elements in  receive  different colors.In  this talk,we  show that ifis a  2-connected simple plane graph with maximum degree ,  then.

报告人2：马草川

报告题目：Commutator estimates with fractional  derivatives and local well-posedness for the generalized MHD  equations

报告摘要：In  this talk,we will discuss the local well-posedness for the generalized MHD  equations with fractional velocity dissipationand  magnetic diffusion.Some  previous results are covered and improved.Moreover,a  reasonable working space to investigate regularity is given.These  works are joint with Prof.Y.Zhou＆Z.Jiang.

报告人3：赵敏

报告题目：Random Attractor for Stochastic Boissonade  System with Time-dependent Deterministic Forces and White  Noises

报告摘要：In  this paper,we  study the long-term dynamical behavior of stochastic Boissonade systems with  time-dependent deterministic forces,additive  white noise and multiplicative white noise.We  first prove the existence of random attractor for the considered systems.And  then we establish the upper semi-continuity of random attractors for the systems  as the coefficient of quadratic term tends to zero and intensities of the noises  approach zero,respectively.At  last,we  obtain an upper bound of fractal dimension of the random attractors for both  systems without quadratic term.