Beyond the Geometry of Music Posted by John Baez Yesterday I had a great conversation with Dmitri Tymoczko about groupoids in music theory. But at this Higgs Centre Colloquium, he preferred to downplay groupoids and talk in a way physicists would enjoy more. Click here to watch his talk! What’s great is that Tymoczkyo not faking it: he’s really found deep ways in which symmetry shows up pervasively in music. At first he tried to describe them geometrically using orbifolds, which are spaces in...