报告地点：行健楼学术活动室526
摘要：In this talk, we introduce a formation mechanism named ``the direct sum of foundation stones" about pinched constantly curved holomorphic two-spheres (write ``PCCH S^2" briefly) in the complex Grassmann manifolds G(k,N), and we completely classify PCCH S^2 in G(2,N), G(3,N), and the non-degenerated PCCH S^2 in G(4,8).
