Degree one Milnor K-invariants of groups of multiplicative type

Degree one Milnor K-invariants of groups of multiplicative type
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乘法群的一阶 Milnor K 不变量

DOI:
10.1016/j.jalgebra.2021.02.020
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发表时间:
2020
期刊:
影响因子:
0.9
通讯作者:
Alexander J. Wertheim
Alexander J. Wertheim
中科院分区:
数学3区
文献类型:
--
作者:
Alexander J. Wertheim

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设G是域F上的可交换仿射代数群,设H:域F→AbGrps是函子。G的A(同态)H不变量是一个自然变换Tors(−,G)→H,其中Tors(−,G)是函子域F→AbGrps,对Spec (L)上G - L-环量的同构类群进行域扩展L/F。本文的目的是计算当G是乘型群,H是域扩展为L/F到lx⊗Z Q/Z的函子时,G的H不变量的群Inv hm 1 (G, H)。
Let G be a commutative affine algebraic group over a field F, and let H: Fields F→ AbGrps be a functor. A (homomorphic) H-invariant of G is a natural transformation Tors (−, G)→ H, where Tors (−, G) is the functor Fields F→ AbGrps taking a field extension L/F to the group of isomorphism classes of G L-torsors over Spec (L). The goal of this paper is to compute the group Inv hom 1 (G, H) of H-invariants of G when G is a group of multiplicative type, and H is the functor taking a field extension L/F to L×⊗ Z Q/Z.
DOI: 10.1093/imrn/rnaa321
发表时间: 2021
影响因子: 1
作者:
Totaro, Burt
通讯作者: Totaro, Burt