Via Peter Woit I see that there is a project to put the archives of Bourbaki online. These are the internal manuscripts that the group generated while writing their famous series of books.

I just ran across an interesting weblog. Henry Wilton taught a course in the spring on geometric group theory, which is the use of topological techniques to prove theorems in group theory. He had his students write up the lecture notes for each...

The tail spikes of stegosauruses are known in palaeontology as the thagomizer. Yes, after the Far Side.

The Polish Virtual Library of Science (which contains Banach’s book) has several other interesting mathematical works in English, French, German, and Polish. They have the archives for several journals, including Studia Mathematica. They also have...

Stefan Banach’s famous monograph, Théorie des opérations linéaires, which gave birth to the field of Banach spaces, is available online.