Group of Isometries of the Lattice $$K_0(\mathbb P_n)$$

Pub Date : 2024-07-05 DOI:10.1134/s0001434624030222
I. S. Beldiev
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Abstract

We study the isometry group of the Grothendieck group \(K_0(\mathbb P_n)\) equipped with a bilinear asymmetric Euler form. We prove several properties of this group; in particular, we show that it is isomorphic to the direct product of \(\mathbb Z/2\mathbb Z\) by the free Abelian group of rank \([(n+1)/2]\). We also explicitly calculate its generators for \(n\le 6\).

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K_0(\mathbb P_n)$$ 的等距网格群
摘要 我们研究了带有双线性不对称欧拉形式的 Grothendieck 群 \(K_0(\mathbb P_n)\) 的等几何群。我们证明了这个群的几个性质;特别是,我们证明了它与秩为\([(n+1)/2]\)的自由阿贝尔群的\(\mathbb Z/2\mathbb Z\) 的直接积同构。我们还明确地计算了它的([(n+1)/2])生成器。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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