Classification of low-dimensional orbit closures in varieties of quiver representations
Colloquium Mathematicum 113 (2008), 55-90 MSC: Primary 14B05; Secondary 14L30, 16G20. DOI: 10.4064/cm113-1-5
We classify the affine varieties of dimension at most 4 which occur as orbit closures with an invariant point in varieties of representations of quivers. Moreover, we show that they are normal and Cohen–Macaulay.