时间：2026年11月12日（周四）16:00-17:00
地点：E14-215
报告人：Wancheng Zhang, Zhejiang University
报告语言：中文
报告题目：A Kähler metric on $\C^n$ with nonnegative Ricci curvature and nonunique tangent cones at infinity
报告摘要：Perelman's four-dimensional example shows how slowly varying cross sections can produce nonunique tangent cones at infinity. In joint work with Jiwei Dai, we obtain the same phenomenon for complete Kähler metrics on Cn, n≥2, with nonnegative Ricci curvature and Euclidean volume growth. The talk compares Perelman's example with our construction on C2, where the Hopf fibration lets us vary the S3 links while preserving Kähler condition and nonnegative Ricci curvature.
