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.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm113-1-5, author = {Pawe\l\ Rochman}, title = {Classification of low-dimensional orbit closures in varieties of quiver representations}, journal = {Colloquium Mathematicae}, volume = {111}, year = {2008}, pages = {55-90}, zbl = {1143.14007}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm113-1-5} }
Paweł Rochman. Classification of low-dimensional orbit closures in varieties of quiver representations. Colloquium Mathematicae, Tome 111 (2008) pp. 55-90. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm113-1-5/