On modular Harish-Chandra series of finite unitary groups
On modular Harish-Chandra series of finite unitary groups
复制标题
关于有限酉群的模 Harish-Chandra 级数
DOI:
10.1090/ert/549
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
E. Norton
中科院分区:
文献类型:
--
作者:
E. Norton
<p>In the modular representation theory of finite unitary groups when the characteristic <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="script l">
<mml:semantics>
<mml:mi>ℓ<!-- ℓ --></mml:mi>
<mml:annotation encoding="application/x-tex">\ell</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> of the ground field is a unitary prime, the <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="ModifyingAbove German s German l With caret Subscript e">
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<mml:mi mathvariant="fraktur">s</mml:mi>
<mml:mi mathvariant="fraktur">l</mml:mi>
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<mml:mo>^<!-- ^ --></mml:mo>
</mml:mover>
</mml:mrow>
<mml:mi>e</mml:mi>
</mml:msub>
<mml:annotation encoding="application/x-tex">\widehat {\mathfrak {sl}}_e</mml:annotation>
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</mml:math>
</inline-formula>-crystal on level <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="2">
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<mml:annotation encoding="application/x-tex">2</mml:annotation>
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</inline-formula> Fock spaces graphically describes the Harish-Chandra branching of unipotent representations restricted to the tower of unitary groups. However, how to determine the cuspidal support of an arbitrary unipotent representation has remained an open question. We show that for <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="script l">
<mml:semantics>
<mml:mi>ℓ<!-- ℓ --></mml:mi>
<mml:annotation encoding="application/x-tex">\ell</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> sufficiently large, the <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="German s German l Subscript normal infinity">
<mml:semantics>
<mml:msub>
<mml:mrow class="MJX-TeXAtom-ORD">
<mml:mi mathvariant="fraktur">s</mml:mi>
<mml:mi mathvariant="fraktur">l</mml:mi>
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<mml:mi mathvariant="normal">∞<!-- ∞ --></mml:mi>
</mml:msub>
<mml:annotation encoding="application/x-tex">\mathfrak {sl}_\infty</mml:annotation>
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</mml:math>
</inline-formula>-crystal on the same level <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="2">
<mml:semantics>
<mml:mn>2</mml:mn>
<mml:annotation encoding="application/x-tex">2</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> Fock spaces provides the remaining piece of the puzzle for the full Harish-Chandra branching rule.</p>
影响因子:
1.3
作者:
Brundan, Jonathan;Savage, Alistair;Webster, Ben
通讯作者:
Webster, Ben
DOI:
10.1007/s00029-020-00602-5
发表时间:
2020
期刊:
Selecta Mathematica
影响因子:
--
作者:
Brundan, Jonathan;Savage, Alistair;Webster, Ben
通讯作者:
Webster, Ben
影响因子:
3.9
作者:
G. Williamson
通讯作者:
G. Williamson