报告题目：New examples for multilinear Hörmander multipliers

报 告 人：贺丹青教授，复旦大学数学科学学院

报告时间：3月20日上午10:30

报告地点：23幢220

报告摘要：The study of multilinear multipliers goes back to the work of Coifman and Meyer in 1970s, who extended Mihlin's result to the bilinear setting. The generalization of their work to the Hörmander type became an important topic in last decade. Due to the weak smoothness of Hörmander multipliers, the description of the boundedness of these multipliers is much more delicate. Actually many partial boundedness results were obtained, but the whole picture is still unclear. This encourages us to study related counterexamples to get a better understanding of this theory. In this talk, we survey the development of multilinear Hörmander multipliers, and present some new counterexamples.