Roland Barthes died almost 30 years ago, on 26
March 1980, but his works continue to engage new
and old readers with remarkable consistency.
Books about him keep appearing: literary and
philosophical essays by Jean-Claude Milner
(2003), Jean-Pierre Richard (2006) and Eric Marty
(2006), a
Dirt. Noise. Crowds. Delays. Scary smells. Even
scarier fluids swirling on the floor. There are
lots of reasons to loathe the New York City
subway, but one very good reason to love it
Helvetica, the typeeface that's used on its signage.
By J. Baez and A. Lauda:
This paper traces the growing role of categories and n-categories in
physics, starting with groups and their role in relativity, and
leading up to more sophisticated concepts which manifest themselves
in Feynman diagrams, spin networks, string theory, loop quantum
