Quivers and the Euclidean group

Details Quivers and the Euclidean group Quivers and the Euclidean group

2007-12-10

arxiv.org/abs/0712.1597v3

Representation theory (Lhasa, China, 2007), 177-188, Contemp. Math., 478, Amer. Math. Soc., Providence, RI, 2007

Mathematics

Representation Theory

12 pages; v2&3: minor typos corrected

Scientific paper

We show that the category of representations of the Euclidean group of orientation-preserving isometries of two-dimensional Euclidean space is equivalent to the category of representations of the preprojective algebra of infinite type A. We also consider the moduli space of representations of the Euclidean group along with a set of generators. We show that these moduli spaces are quiver varieties of the type considered by Nakajima. Using these identifications, we prove various results about the representation theory of the Euclidean group. In particular, we prove it is of wild representation type but that if we impose certain restrictions on weight decompositions, we obtain only a finite number of indecomposable representations.

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