Alexander Pütz
We study finite dimensional approximations to degenerate versions of affine flag varieties using quiver Grassmannians for cyclic quivers. We prove that they admit cellular decompositions parametrized by affine Dellac configurations, and that their irreducible components are normal Cohen-Macaulay varieties with rational singularities.
Alexander Pütz
This paper contains 28 sections, 24 theorems, 84 equations.
Theorem 1.3
Let $Q$ be a finite connected quiver and $\mathrm{I}$ an admissible ideal of the path algebra $\Bbbk Q$. The indecomposable injective representation of the bound quiver $(Q,\mathrm{I})$ ending at vertex $j \in Q_0$ is denoted by $I_j$. Then where and $\mathrm{M}^s_{\mathbf{e},\mathbf{d}}(Q,\mathrm{I})$ is the geometric quotient of $\mathrm{R}^s_{\mathbf{e},\mathbf{d}}(Q,\mathrm{I})$ by the group
