Isometries of CAT(0) Spaces
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This is the “3+X” seminar on CAT(0) spaces, organized by Prof. Wenyuan Yang in 2025 Fall at Peking University. The reference is M. R. Bridson and A. Haefliger’s Metric Spaces of Non-Positive Curvature.
I presented chapter II.6 of Metric Spaces of Non-Positive Curvature, focusing on the isometries of CAT(0) spaces. Notes