Thời gian: 9h00 thứ 6 ngày 18/12/2015.
Địa điểm: P409 T3, Trường ĐH KHTN.
Báo cáo viên: TS. Trần Thanh Hưng (Irvine University).
Tên báo cáo: Complete manifolds with bounded curvature and spectral gaps.
Tóm tắt báo cáo: We study the spectrum of complete noncompact manifolds with bounded curvature and positive injectivity radius. We give general conditions which imply that their essential spectrum has an arbitrarily large finite number of gaps. Some applications include showing spectral gaps for noncompact covering of a compact manifold or a noncompact manifold with a metric uniformly equivalent to a given one. This is a joint work with Richard Schoen.