On representation schemes and Grassmanians of finite dimensional algebras and a construction of Lusztig

Details On representation schemes and Grassmanians of finite dimensional algebras and a construction of Lusztig On representation schemes and Grassmanians of finite dimensional algebras and a construction of Lusztig

2009-11-10

arxiv.org/abs/0911.1948v2

Mathematics

Algebraic Geometry

8 pages, Accepted, Math. Res. Lett

Scientific paper

Let I be a finite set and CI be the algebra of functions on I. For a finite dimensional C algebra A with \CI contained in A we show that certain moduli spaces of finite dimsional modules are isomorphic to certain Grassmannian (quot-type) varieties. There is a special case of interest in representation theory. Lusztig defined two varieties related to a quiver and gave a bijection between their C-points (citation in article). Savage and Tingley raised the question (citation in article) of whether these varieties are isomorphic as algebraic varieties. This question has been open since Lusztig's original work. It follows from the result of this note that the two varieties are indeed isomorphic.

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