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Computing GIT-fans with symmetry and the Mori chamber decomposition of $\overline {M}_{0,6}$
Mathematics of Computation ( IF 2.2 ) Pub Date : 2020-06-30 , DOI: 10.1090/mcom/3546
Janko Böhm , Simon Keicher , Yue Ren

We propose an algorithm to compute the GIT-fan for torus actions on affine varieties with symmetries. The algorithm combines computational techniques from commutative algebra, convex geometry and group theory. We have implemented our algorithm in the Singular library gitfan.lib. Using our implementation, we compute the Mori chamber decomposition of the cone of movable divisors of $\bar{M}_{0,6}$.

中文翻译:

计算具有对称性的 GIT-fans 和 $\overline {M}_{0,6}$ 的 Mori 室分解

我们提出了一种算法来计算具有对称性的仿射变体上的环面动作的 GIT-fan。该算法结合了交换代数、凸几何和群论的计算技术。我们已经在 Singular 库 gitfan.lib 中实现了我们的算法。使用我们的实现,我们计算 $\bar{M}_{0,6}$ 的可移动除数锥的 Mori 室分解。
更新日期:2020-06-30
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