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Oct 12
3:30 PM - 4:30 PM KAP 414
Poincaré and the early history of 3-manifolds
John Stillwell University of San Francisco (joint with the department colloquium)

The name of Poincar remains well known in low-dimensional topology, 100 years after his death, thanks to the recent solution of his famous conjecture about the 3-sphere. In this talk we will try to recreate the world of 3-manifolds in the time of Poincar´e and his immediate successors, with special attention to the contributions of Heegaard, Wirtinger, Tietze, Dehn and Alexander.

Previous colloquium: Self-similarity of random trees and applications Next colloquium: Bayes and Empirical Bayes Information (Learning from the experience of others)