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Here you can download my papers and thesis as pdf-files.
They are grouped according to topic (although in several cases there is substantial overlap).
Summaries can be found on the arXiv.



Hecke algebras of p-adic groups

 Hochschild homology of reductive p-adic groups
    March 2022, arXiv:2203.06435

 Parameters of Hecke algebras for Bernstein components of p-adic groups
    March 2021, arXiv:2103.13113

 Endomorphism algebras and Hecke algebras for reductive p-adic groups
    May 2020, arXiv:2005.07899

 On completions of Hecke algebras
    pp. 207-262 in: Representations of p-adic groups
    A.-M. Aubert, M. Mishra, A. Roche, S. Spallone (eds.),
    Progress in Mathematics 328, Birkhäuser, 2019

 Periodic cyclic homology of reductive p-adic groups
    Journal of Noncommutative Geometry 3.4 (2009), 501-558


Unipotent representations

 On unipotent representations of ramified p-adic groups
    December 2020, arXiv:1912.08451

 On formal degrees of unipotent representations
    joint with Yongqi Feng and Eric Opdam
    J. Inst. Math. Jussieu (2021)

 A local Langlands correspondence for unipotent representations
    July 2021, arXiv:1806.11357

 Supercuspidal unipotent representations: L-packets and formal degrees
    joint with Yongqi Feng and Eric Opdam
    Journal de l'École polytechnique Mathématiques 7 (2020), 1133-1193


Hecke algebras and Langlands parameters

 Graded Hecke algebras and equivariant constructible sheaves on the nilpotent cone
    May 2022, arXiv:2205.07490

 Graded Hecke algebras, constructible sheaves and the p-adic Kazhdan--Lusztig conjecture
    May 2022, arXiv:2106.03196v2

 Langlands parameters, functoriality and Hecke algebras
    Pacific J. Math. 304.1 (2020), 209-302

 Affine Hecke algebras for Langlands parameters
    joint with Anne-Marie Aubert and Ahmed Moussaoui
    December 2019, arXiv:1701.03593

  Graded Hecke algebras for disconnected reductive groups
    joint with Anne-Marie Aubert and Ahmed Moussaoui
    pp. 23-84 in: Geometric aspects of the trace formula, W. Müller, S. W. Shin, N. Templier (eds.)
    Simons Symposia, Springer, 2018
    arXiv:1607.02713 -- with an appendix from 2018

  The principal series of p-adic groups with disconnected centre
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    Proc. London Math. Soc. 114.5 (2017), 798-854


Local Langlands program

 Generalizations of the Springer correspondence and cuspidal Langlands parameters
    joint with Anne-Marie Aubert and Ahmed Moussaoui
    Manus. Math. 157 (2018), 121-192

 Conjectures about p-adic groups and their noncommutative geometry
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    Contemp. Math. 691 (2017), 15-51

 Geometric structure in smooth dual and local Langlands conjecture
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    Japanese Journal of Mathematics 9 (2014), 99-136

  On the local Langlands correspondence for non-tempered representations
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    Münster Journal of Mathematics 7 (2014) 27-50


GLn, SLn, and their inner forms

  Smooth duals of inner forms of GLn and SLn
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    Doc. Math. 24 (2019), 373-420

  On L-packets and depth for SL2(K) and its inner form
    joint with Anne-Marie Aubert, Sergio Mendes and Roger Plymen
    Int. J. Number Theory 10.13 (2017), 2545-2568

 Hecke algebras for inner forms of p-adic special linear groups
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    J. Inst. Math. Jussieu 16.2 (2017), 351-419

 Depth and the local Langlands correspondence
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    pp. 17--41 in: Arbeitstagung Bonn 2013. In memory of Friedrich Hirzebruch
    Progress in Mathematics 319, Birkhäuser, 2016

  The local Langlands correspondence for inner forms of SLn
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    Research in the Mathematical Sciences 3.32 (2016)


p-adic groups and their buildings

  The Buildings Gallery: visualising buildings
    joint with Bram Bekker
    J. Math. Arts (2022), doi.org/10.1080/17513472.2022.2063782

  Pseudo-reductive and quasi-reductive groups over non-archimedean local fields
    Journal of Algebra 510 (2018), 331-392

  Resolutions of tempered representations of reductive p-adic groups
    joint with Eric Opdam
    Journal of Functional Analysis 265 (2013), 108-134

 Characters and growth of admissible representations of reductive p-adic groups
    joint with Ralf Meyer
    Journal de l'Institute de Mathematiques de Jussieu 11.2 (2012), 289-331

 Resolutions for representations of reductive p-adic groups via their buildings
    joint with Ralf Meyer
    Journal für die reine und angewandte Mathematik 647 (2010), 115-150


Other representation theory of p-adic groups

  Geometric structure for the principal series of a split reductive p-adic group with connected centre
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    J. Noncommut. Geom. 10 (2016), 663-680

  Geometric structure and the local Langlands conjecture
    preprint, joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    arXiv:1211.0180v3, 2013

  The second adjointness theorem for reductive p-adic groups
    preprint, joint with Ralf Meyer
    April 2010, arXiv:1004.4290


Representation theory of Hecke algebras

 Affine Hecke algebras and their representations
   Indagationes Mathematicae (2021)

 Extensions of tempered representations
    joint with Eric Opdam
    Geometric And Functional Analysis 23 (2013), 664-714

 On the classification of irreducible representations of affine Hecke algebras with unequal parameters
    Representation Theory 16 (2012), 1-87

 Parabolically induced representations of graded Hecke algebras
    Algebras and Representation Theory 15.2 (2012), 233-271

 Discrete series characters for affine Hecke algebras and their formal degrees
    joint with Eric Opdam
    Acta Mathematica 205 (2010), 105-187


Homology of Hecke algebras

 Hochschild homology of twisted crossed products and twisted graded Hecke algebras
    January 2022, arXiv:2201.11186

 Topological K-theory of affine Hecke algebras
    Annals of K-theory 3.3 (2018), 395-460

 Hochschild homology of affine Hecke algebras
    Journal of Algebra 384 (2013), 1-35

 Homology of graded Hecke algebras
    Journal of Algebra 323 (2010), 1622-1648
    arXiv:1108.5286 -- with some corrections from 2022

 Homological algebra for affine Hecke algebras
    joint with Eric Opdam
    Advances in Mathematics 220 (2009), 1549-1601

 Periodic cyclic homology of Hecke algebras and their Schwartz completions
   preprint, April 2006
    arXiv:math.KT/0605042


Noncommutative geometry

 Some homological properties of algebras involving smooth functions
    preprint, joint with David Kazhdan
    February 2022, arXiv:2202.06573

 Morita equivalence for k-algebras
    joint with Anne-Marie Aubert, Paul Baum and Roger Plymen
    Banach Centre Publications 120 (2020), 245-265

 Conjugacy of Levi subgroups of reductive groups and a generalization to linear algebraic groups
   J. Pure Applied Algebra, 224.6 (2020), doi.org/10.1016/j.jpaa.2019.106254

 On the Baum--Connes conjecture with coefficients for linear algebraic groups
   February 2019, arXiv:1901.08807

 Some Fréchet algebras for which the Chern character is an isomorphism
    K-Theory 36 (2005), 275-290 
    arXiv:math.KT/0505282 -- with an appendix from 2008


Theses
In September 2002 I finished my studies at the UvA with the master's thesis Lie algebra cohomology and Macdonald's conjectures

On 6 March 2007 I successfully defended my Ph.D. thesis Periodic cyclic homology of affine Hecke algebras at the Universiteit van Amsterdam. You can find the Dutch summary here.

In November 2008 the Dutch Genootschap ter bevordering van natuur-, genees- en heelkunde awarded me the Andreas Bonn medal for my research as a PhD-student.

In June 2011 I obtained my Habilitation at the Universität Göttingen. For this occasion I gave a Lehrvortrag and I wrote an extensive Forschungsbericht (in German).
cover of PhD thesis