报告题目：Multiple sign-changing solutions for nonlinear elliptic systems

　　报告人： 王志强教授（天津大学应用数学中心）

　　报告时间： 2015年4月7日（周二）上午10: 00

　　报告地点：武汉物数所综合楼三楼会议室

　　报告摘要：We present recent work on multiplicity results on sign-changing solutions for a class of nonlinear Schrodinger type systems. For the repulsive case we construct proper invariant sets of a descending pseudo gradient flow and using minimax arguments we construct multiple sign-changing solutions. The method is built upon an abstract framework and is applicable to other problems.