Prof. Große-Klönne erforscht die arithmetische Theorie p-adischer Strukturen, insbesondere die Konstruktion und Klassifikation von modularen (φ,Γ)-Modulen und deren Verbindung zu Darstellungstheorie. Seine aktuelle Arbeit konzentriert sich auf explizite Integralstrukturen in diesen Modulen, kombinatorische Degenerationsphänomene und die Entwicklung von Funktoren zwischen pro-p-Iwahori-Hecke-Algebren und p-adischen Kohomologietheorien. Diese Forschung liefert fundamentale mathematische Werkzeuge für die Zahlentheorie und arithmetische Geometrie, mit Anwendungen in der Galois-Theorie und modularen Arithmetik.
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Prof. Dr. Elmar Große-Klönne
HU-FIS-Profil ↗Förderer: DFG sonstige Programme Zeitraum: 06/2009 - 05/2011 Projektleitung: Prof. Dr. Elmar Große-Klönne
Förderer: Alexander von Humboldt-Stiftung Zeitraum: 06/2011 - 08/2011 Projektleitung: Prof. Dr. Elmar Große-Klönne
Zeitraum: 01/2012 - 12/2015 Projektleitung: Prof. Dr. Elmar Große-Klönne
Journal of Algebraic Geometry · DOI
We define Frobenius and monodromy operators on the de Rham cohomology of <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper K"> <mml:semantics> <mml:mi>K</mml:mi> <mml:annotation encoding="application/x-tex">K</mml:annotation> </mml:semantics> </mml:math> </inline-formula> -dagger spaces (rigid spaces with overconvergent structure sheaves) with strictly semistable reduction <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper Y"> <mml:semantics> <mml:mi>Y</mml:mi> <mml:annotation encoding="application/x-tex">Y</mml:annotation> </mml:semantics> </mml:math> </inline-formula> , over a complete discrete valuation ring <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper K"> <mml:semantics> <mml:mi>K</mml:mi> <mml:annotation encoding="application/x-tex">K</mml:annotation> </mml:semantics> </mml:math> </inline-formula> of mixed characteristic. For this we introduce log rigid cohomology and generalize the so-called Hyodo-Kato isomorphism to versions for non-proper <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper Y"> <mml:semantics> <mml:mi>Y</mml:mi> <mml:annotation encoding="application/x-tex">Y</mml:annotation> </mml:semantics> </mml:math> </inline-formula> , for non-perfect residue fields, for non-integrally defined coefficients, and for the various strata of <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper Y"> <mml:semantics> <mml:mi>Y</mml:mi> <mml:annotation encoding="application/x-tex">Y</mml:annotation> </mml:semantics> </mml:math> </inline-formula> . We apply this to define and investigate crystalline structure elements on the de Rham cohomology of Drinfel’d’s symmetric space <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper X"> <mml:semantics> <mml:mi>X</mml:mi> <mml:annotation encoding="application/x-tex">X</mml:annotation> </mml:semantics> </mml:math> </inline-formula> and its quotients. Our results are used in a critical way in the recent proof of the monodromy-weight conjecture for quotients of <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper X"> <mml:semantics> <mml:mi>X</mml:mi> <mml:annotation encoding="application/x-tex">X</mml:annotation> </mml:semantics> </mml:math> </inline-formula> given by de Shalit (2005).
Duke Mathematical Journal · DOI
Let F be a non-Archimedean locally compact field, and let G be a split connected reductive group over F. For a parabolic subgroup Q⊂G and a ring L, we consider the G-representation on the L-module C∞(G/Q,L)/∑Q'⊋QC∞(G/Q',L).(∗) Let I⊂G denote an Iwahori subgroup. We define a certain free finite rank-L module M (depending on Q; if Q is a Borel subgroup, then (∗) is the Steinberg representation and M is of rank 1) and construct an I-equivariant embedding of (∗) into C∞(I,M). This allows the computation of the I-invariants in (∗). We then prove that if L is a field with characteristic equal to the residue characteristic of F and if G is a classical group, then the G-representation (∗) is irreducible. This is the analogue of a theorem of Casselman (which says the same for L=C); it had been conjectured by Vignéras. Herzig (for G=GLn(F)) and Abe (for general G) have given classification theorems for irreducible admissible modulo p representations of G in terms of supersingular representations. Some of their arguments rely on the present work.
Duke Mathematical Journal · DOI
Let o be the ring of integers in a finite extension K of Qp, and let k be its residue field. Let G be a split reductive group over Qp, and let T be a maximal split torus in G. Let H(G,I0) be the pro-p Iwahori–Hecke o-algebra. Given a semi-infinite reduced chamber gallery (alcove walk) C(•) in the T-stable apartment, a period ϕ∈N(T) of C(•) of length r, and a homomorphism τ:Zp×→T compatible with ϕ, we construct a functor from the category Modfin(H(G,I0)) of finite-length H(G,I0)-modules to étale (φr,Γ)-modules over Fontaine’s ring OE. If G=GLd+1(Qp), then there are essentially two choices of (C(•),ϕ,τ) with r=1, both leading to a functor from Modfin(H(G,I0)) to étale (φ,Γ)-modules and hence to GalQp-representations. Both induce a bijection between the set of absolutely simple supersingular H(G,I0)⊗ok-modules of dimension d+1 and the set of irreducible representations of GalQp over k of dimension d+1. We also compute these functors on modular reductions of tamely ramified locally unitary principal series representations of G over K. For d=1, we recover Colmez’s functor (when restricted to o-torsion GL2(Qp)-representations generated by their pro-p Iwahori invariants).