Plancherel theory for real spherical spaces: Construction of the Bernstein morphisms

Plancherel theory for real spherical spaces: Construction of the Bernstein morphisms
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实球形空间的 Plancherel 理论:伯恩斯坦态射的构造

DOI:
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发表时间:
2018
影响因子:
3.9
通讯作者:
H. Schlichtkrull
H. Schlichtkrull
中科院分区:
数学1区
文献类型:
--
作者:
P. Delorme;F. Knop;Bernhard Krotz;H. Schlichtkrull

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<p>本文为真实的球面空间上的Plancherel理论奠定了基础<inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper Z equals upper G slash upper H"> <mml:semantics> <mml:mrow> <mml:mi>Z</mml:mi> <mml:mo>=</mml:mo> <mml:mi>G</mml:mi> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mo>/</mml:mo> </mml:mrow> <mml:mi>H</mml:mi> </mml:mrow> <mml:annotation encoding="application/x-tex">Z=G/H</mml:annotation> </mml:semantics> </mml:math> </inline-formula>,即它提供了<inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper L squared left-parenthesis upper Z right-parenthesis"> <mml:semantics> <mml:mrow> <mml:msup> <mml:mi>L</mml:mi> <mml:mn>2</mml:mn> </mml:msup> <mml:mo stretchy="false">(</mml:mo> <mml:mi>Z</mml:mi> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> <mml:annotation encoding="application/x-tex">L^2(Z)</mml:annotation> </mml:semantics> </mml:math> </inline-formula>通过伯恩斯坦态射转化为不同的表示系列。这些级数由球面根的子集参数化,球面根的子集决定了<inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper Z"> <mml:semantics> <mml:mi>Z</mml:mi> <mml:annotation encoding="application/x-tex">Z</mml:annotation> </mml:semantics> </mml:math> </inline-formula>在无穷远处。特别地,我们得到了一个推广的Maass-Selberg关系。作为推论,我们得到离散谱的部分几何表征:<inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper L squared left-parenthesis upper Z right-parenthesis Subscript normal d normal i normal s normal c Baseline not-equals normal empty-set"> <mml:semantics> <mml:mrow> <mml:msup> <mml:mi>L</mml:mi> <mml:mn>2</mml:mn> </mml:msup> <mml:mo stretchy="false">(</mml:mo> <mml:mi>Z</mml:mi> <mml:msub> <mml:mo stretchy="false">)</mml:mo> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">D</mml:mi> <mml:mi mathvariant="normal">我</mml:mi> <mml:mi mathvariant="normal">S</mml:mi> <mml:mi mathvariant="normal">C</mml:mi> </mml:mrow> </mml:mrow> </mml:msub> <mml:mo>≠<!-- ≠ --></mml:mo> <mml:mi mathvariant="normal">∅<!-- ∅ --></mml:mi> </mml:mrow> <mml:annotation encoding="application/x-tex">L^2(Z)_{mathrm {disc}} eq空集</mml:annotation> </mml:semantics> </mml:math> </inline-formula>如果<inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="German h Superscript up-tack"> <mml:semantics> <mml:msup> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="fraktur">H</mml:mi> </mml:mrow> <mml:mo>⊥<!-- ⊥ --></mml:mo> </mml:msup> <mml:annotation encoding="application/x-tex">mathfrak {h}^perp</mml:annotation> </mml:semantics> </mml:math> </inline-formula>在其内部包含椭圆元素。</p> <p>如果<inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper Z"> <mml:semantics> <mml:mi>Z</mml:mi> <mml:annotation encoding="application/x-tex">Z</mml:annotation> </mml:semantics> </mml:math> </inline-formula>是一个真实的约化群,或者更一般地说,是一个对称空间,我们的结果检索的Plancherel公式的Harish-Chandra(组)以及Delorme和货车登班Schlichtkrull(对称空间)的离散系列的诱导数据的明确确定。</p>
<p>This paper lays the foundation for Plancherel theory on real spherical spaces <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper Z equals upper G slash upper H"> <mml:semantics> <mml:mrow> <mml:mi>Z</mml:mi> <mml:mo>=</mml:mo> <mml:mi>G</mml:mi> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mo>/</mml:mo> </mml:mrow> <mml:mi>H</mml:mi> </mml:mrow> <mml:annotation encoding="application/x-tex">Z=G/H</mml:annotation> </mml:semantics> </mml:math> </inline-formula>, namely it provides the decomposition of <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper L squared left-parenthesis upper Z right-parenthesis"> <mml:semantics> <mml:mrow> <mml:msup> <mml:mi>L</mml:mi> <mml:mn>2</mml:mn> </mml:msup> <mml:mo stretchy="false">(</mml:mo> <mml:mi>Z</mml:mi> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> <mml:annotation encoding="application/x-tex">L^2(Z)</mml:annotation> </mml:semantics> </mml:math> </inline-formula> into different series of representations via Bernstein morphisms. These series are parametrized by subsets of spherical roots which determine the fine geometry of <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper Z"> <mml:semantics> <mml:mi>Z</mml:mi> <mml:annotation encoding="application/x-tex">Z</mml:annotation> </mml:semantics> </mml:math> </inline-formula> at infinity. In particular, we obtain a generalization of the Maass-Selberg relations. As a corollary we obtain a partial geometric characterization of the discrete spectrum: <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper L squared left-parenthesis upper Z right-parenthesis Subscript normal d normal i normal s normal c Baseline not-equals normal empty-set"> <mml:semantics> <mml:mrow> <mml:msup> <mml:mi>L</mml:mi> <mml:mn>2</mml:mn> </mml:msup> <mml:mo stretchy="false">(</mml:mo> <mml:mi>Z</mml:mi> <mml:msub> <mml:mo stretchy="false">)</mml:mo> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">d</mml:mi> <mml:mi mathvariant="normal">i</mml:mi> <mml:mi mathvariant="normal">s</mml:mi> <mml:mi mathvariant="normal">c</mml:mi> </mml:mrow> </mml:mrow> </mml:msub> <mml:mo>≠<!-- ≠ --></mml:mo> <mml:mi mathvariant="normal">∅<!-- ∅ --></mml:mi> </mml:mrow> <mml:annotation encoding="application/x-tex">L^2(Z)_{mathrm {disc}} eq emptyset</mml:annotation> </mml:semantics> </mml:math> </inline-formula> if <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="German h Superscript up-tack"> <mml:semantics> <mml:msup> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="fraktur">h</mml:mi> </mml:mrow> <mml:mo>⊥<!-- ⊥ --></mml:mo> </mml:msup> <mml:annotation encoding="application/x-tex">mathfrak {h}^perp</mml:annotation> </mml:semantics> </mml:math> </inline-formula> contains elliptic elements in its interior.</p> <p>In case <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper Z"> <mml:semantics> <mml:mi>Z</mml:mi> <mml:annotation encoding="application/x-tex">Z</mml:annotation> </mml:semantics> </mml:math> </inline-formula> is a real reductive group or, more generally, a symmetric space our results retrieve the Plancherel formula of Harish-Chandra (for the group) as well as that of Delorme and van den Ban-Schlichtkrull (for symmetric spaces) up to the explicit determination of the discrete series for the inducing datum.</p>
DOI: 10.1016/j.aim.2017.03.025
发表时间: 2017
影响因子: 1.7
作者:
B. Harris;T. Weich
通讯作者: T. Weich