http://www2.math.uni-wuppertal.de/~huber/

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http://www.mathi.uni-heidelberg.de/~wingberg/agwingberg/wingberg.html

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Metric Spaces of Non-Positive Curvature - Martin R. Bridson, André Häfliger - Google Books

http://books.google.de/books/about/Metric_Spaces_of_Non_Positive_Curvature.html?id=3DjaqB08AwAC&redir_esc=y

The purpose of this book is to describe the global properties of complete simply connected spaces that are non-positively curved in the sense of A. D. Alexandrov and to examine the structure of groups that act properly on such spaces by isometries. Thus…

Deformations of Algebraic Schemes - Edoardo Sernesi - Google Books

https://books.google.de/books?id=xkcpQo9tBN8C

In one sense, deformation theory is as old as algebraic geometry itself: this is because all algebro-geometric objects can be “deformed” by suitably varying the coef?cients of their de?ning equations, and this has of course always been known by the…

1. Autobiografie von Telemann, 1718 - Telemann in Magdeburg

http://www.telemann.org/ueber-telemann/biographie/autobiopraphien/id-1718.html

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