Yet another weird SF fan
 I'm a mathematician, a libertarian, and a science-fiction fan. Common sense? What's that?Go to first entry

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 Yet another weird SF fan

### Odd Author at the Math Archive

I noticed the following at the mathematics arXiv:

Title: Branch Rings, Thinned Rings, Tree Enveloping Rings

Authors: Bilbo Baggins, Laurent Bartholdi
Categories: RA Rings and Algebras (GR Group Theory)
Abstract: We develop the theory of branch algebras'', which are infinite-dimensional associative algebras that are isomorphic, up to taking subrings of finite codimension, to a matrix ring over themselves. The main examples come from groups acting on trees. In particular, we construct an algebra over the field of two elements, that is finitely generated, prime, infinite-dimensional but with all proper quotients finite, has a recursive presentation, is graded, and has Gelfand-Kirillov dimension 2.