Smoothness and Rational Smoothness of Schubert Varieties...
摘要: We discuss various criteria to determine which points \(\dot \upsilon : = \upsilon \mathcal{B} \in {X_w} \subset \mathcal{G}/\mathcal{B}\) are smooth or rationally smooth, where \(\mathcal{G}\) is any KacMoody group and υ≤ w ∈ W ....