Plancherel theory for real spherical spaces: Construction of the Bernstein morphisms
Plancherel theory for real spherical spaces: Construction of the Bernstein morphisms
复制标题
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
中科院分区:
文献类型:
--
作者:
P. Delorme;F. Knop;Bernhard Krotz;H. Schlichtkrull
<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>
影响因子:
1.7
作者:
B. Harris;T. Weich
通讯作者:
T. Weich