学术报告（徐欣 2024.5.20）

摘要：In this talk, we prove there exists a family of two-fold uniformly rotating doubly-connected vortex patches emanating from some annuli, which correspond to a very degenerate case in the scenario of linearization. This result partially answers an open problem proposed by Hmidi and Mateu (2016), and also imply the essence of this problem is brought by strong degeneracy.