Wiki source code of Koivisto, Juhani

Last modified by jakkoivi@helsinki_fi on 2024/02/13 07:32
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3 [[image:attach:jk.jpg]]
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7 == Juhani Koivisto ==
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9 Tohtorikoulutettava
10 Doktorand
11 Doctoral student
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21 === Research ===
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23 My research interests include: geometric group theory; coarse geometry; LCCG groups; and analysis on metric spaces. In particular, I have worked on generalizations of property (T) for reflexive Banach spaces; amenability of metric spaces; and controlled coarse homology of metric measure spaces. For automorphism groups of simplicial complexes I have obtained a spectral condition for the vanishing of L^^2^^ -cohomology with coefficients in uniformly bounded representations. For metric spaces, I have proved that each uniformly coarsely proper visual Gromov hyperbolic space with connected boundary containing at least two points is non-amenable. For uniform metric measure spaces supporting a local weak (1,1)-Poincaré inequality, I have completely characterised the vanishing of its fundamental class in the controlled coarse homology by a global Sobolev inequality.
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25 === Activities ===
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27 Organiser of the [[Student Colloquium>>url:https://wiki.helsinki.fi/display/mathstatOpiskelu/Opiskelijakollokvio||shape="rect"]] Fall 2014 - Spring 2016.
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29 === (% style="font-size: 16.0px;line-height: 1.5;" %)Publications(%%) ===
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31 J. Koivisto, Automorphism groups of simplicial complexes and rigidity for uniformly bounded representations, Geom. Dedicata, (% style="color: rgb(51,51,51);" %)April 2014, Volume 169, (%%)[[Issue 1>>url:http://link.springer.com/journal/10711/169/1/page/1||style="text-decoration: none;" shape="rect"]](% style="color: rgb(51,51,51);" %), pp 57-82
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33 === Pre-prints ===
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35 J. Koivisto, Non-amenability and visual Gromov hyperbolic spaces [[arXiv:1505.04662>>url:http://arxiv.org/abs/1505.04662||shape="rect"]], accepted by Groups Geom. Dyn.
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37 J. Koivisto, Characterising Sobolev inequalities by controlled coarse homology and applications for hyperbolic spaces [[arXiv:1402.5816>>url:http://arxiv.org/abs/1402.5816||shape="rect"]], accepted by Rev. Mat. Iberoamericana
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39 === (% style="line-height: 1.5;" %)Teaching(%%) ===
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41 Teaching assistant in: Introduction to Differential Geometry (Fall 2009, 2012); Metric Geometry (Fall 2013).
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43 === Visits ===
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45 Technion, Israel Institute of Technology, 20 July -3 August 2013
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47 Technion, Israel Institute of Technology, 14 January - 28 May 2014
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49 University of Souther Denmark, 26 - 29 April 2016
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51 === Past conferences and meetings ===
52
53 Summer School in //Geometric Analysis in Samos//, Karlovassi, Samos (Greece) 31 May  - 4 June  2010
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55 //Workshop on Geometric Group Theory//, Heilbronn Institute, Bristol (England), 20-24 June 2011
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57 //Young Geometric Group Theory Meeting//, Bedlewo (Poland), 9-13 January 2012
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59 //6th European Congress of Mathematics//, Kraków (Poland), 2-7 July 2012
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61 //Young Geometric Group Theory II//, The Technion, Haifa (Israel), 3-7 February 2013
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63 //3rd Young Geometric Group Theory Meeting//, CIRM, Luminy, Marseille (France), 20-24 January 2014
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65 //Random Walks and Asymptotic Geometry of Groups, //Institut Henri Poincaré, Paris (France), 24-28 March 2014
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67 //Mapping class groups and Teichmüller theory//, Ramat HaNadiv, Haifa (Israel), 7-14 May 2014
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69 //Mathematics Meets Physics, //University of Helsinki, Helsinki (Finland), 24-27 June 2014
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71 //24th Jyväskylä Summer School//, Jyväskylä (Finland), 11-15 August 2014
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73 //Geometric and Combinatorial Group Theory//, The Israel Institute for Advanced Study, Jerusalem (Israel), 14-20 December 2014
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75 //Young Geometric Group Theory IV//, Sol Cress, Spa (Belgium), 11-17 January 2015
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77 //Saint Petersburg- Helsinki Math Colloquium, //Chebyshev Laboratory, Saint Petersburg State University, Saint Petersburg (Russia), 5-7 May 2015
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79 Summer School in// Cohomology and Large Scale Geometry, //Universität Regensburg, Regensburg (Germany), 27-31 July 2015
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81 //Geometric Function Theory meets Geometric Group Theory (GFT meets GGT), //Banach Center, Warsaw (Poland), 15-17 October 2015
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83 //Young Geometric Group Theory V//, KIT, Karlsruhe (Germany), 15-19 February 2016
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85 \\
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87 (% style="font-size: 16.0px;font-weight: bold;line-height: 1.5;" %)Upcoming conferences
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89
90 //Danish-Norwegian workshop on operator algebras, //Lusebu, Oslo (Norway), 5-8 January 2017
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96 ==== Yhteystiedot ====
97
98 Huone: B428
99 Osoite: PL 68 (Gustaf Hällströmin katu 2b)
100 00014 Helsingin yliopisto
101 Puhelin: (09) 191
102 Sähköposti: juhani.koivisto 'at' helsinki.fi
103
104 ==== Kontaktinformation ====
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106 Rum: B428
107 Adress: PB 68 (Gustaf Hällströms gata 2b)
108 00014 Helsingfors universitet
109 Telefon: (09) 191
110 Epost: juhani.koivisto 'at' helsinki.fi
111
112 ==== Contact information ====
113
114 Room: B428
115 Address: P.O. Box 68 (Gustaf Hällströmin katu 2b)
116 FI-00014 University of Helsinki
117 Telephone: +358-9-191
118 Email: juhani.koivisto 'at' helsinki.fi
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