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arXiv 2008.10096math.RTmath.GR
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关于最大分裂情形下的归纳Alperin-McKay条件

On the Inductive Alperin-McKay Conditions in the Maximally Split Case

Marc Cabanes, A. A. Schaeffer Fry, Britta Späth

摘要:

Alperin-McKay猜想将$\ell$ -块的零高度特征标与其Brauer对应块的零高度特征标联系起来。第三作者把这个猜想归结为关于拟单群的归纳Alperin-McKay条件。这些条件对于李型群仍然是开放的。本文讨论了当$\ell$整除$q-1$时,具有$q$元的域上Lie型群的$\ell$ -块的零高特征.我们还提供了有关$\ell$ -块和Brauer通信的信息。作为应用,我们证明了$\mathbb{F}_q$上的$C$型拟单群对素数$\ell\geq 5$和整除$q-1$满足归纳Alperin-McKay条件.为此目的的一些方法改编自Malle-Späth的工作。

英文摘要:

The Alperin-McKay conjecture relates height zero characters of an $\ell$-block with the ones of its Brauer correspondent. This conjecture has been reduced to the so-called inductive Alperin-McKay conditions about quasi-simple groups by the third author. Those conditions are still open for groups of Lie type. The present paper describes characters of height zero in $\ell$-blocks of groups of Lie type over a field with $q$ elements when $\ell$ divides $q-1$. We also give information about $\ell$-blocks and Brauer correspondents. As an application we show that quasi-simple groups of type $C$ over $\mathbb{F}_q$ satisfy the inductive Alperin-McKay conditions for primes $\ell\geq 5$ and dividing $q-1$. Some methods to that end are adapted from the work of Malle--Späth.

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