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Low Dimensional Topology

Recent Progress and Open Problems

Gowers's Weblog

Mathematics related discussions

Fight with Infinity

Wir müssen wissen, wir werden wissen

The polymath blog

Massively collaborative mathematical projects

Chris Aldrich

Musings of a Modern Day Cyberneticist

What's new

Updates on my research and expository papers, discussion of open problems, and other maths-related topics. By Terence Tao