EPSRC Grant EP/K016687/1 "Topology, Geometry and Laplacians of Simplicial Complexes"

Talks, Conferences and Research Visits

2013

• Ioannis Ivrissimtzis: 14th IMA Conference on Mathematics of Surfaces, 11 September-13 September, 2013, Birmingham, paper presentation "Model selection for the Dubuc-Deslauriers family of subdivision schemes" (joint work with Ghulam Mustafa, The Islamia University of Bahawalpur, Pakistan)
• Harald Helfgott (École Normale Supérieure - Paris) visits Alina Vdovina, 29 August - 1 September, 2013
• Norbert Peyerimhoff: Algebra-Geometry Seminar Newcastle, 1 October, 2013, Title: Groups with Beauville structures, hyperbolic surfaces and expanders
• Shiping Liu: Murray Gell-Mann Forum, 8 October-22 October, 2013, Topics: Spectral Graph Theory, Optimal Transport Theory, Central China Normal University, Wuhan 430079, China, Title of Minicourse: Optimal transport meets graph spectra
• Norbert Peyerimhoff visits Oliver Baues, Christian-Albrechts-Universität zu Kiel, 8-15 December, 2013, Talk in Mathematisches Seminar Kiel on 11 December, 2013, Title: Geometrie von polygonalen Komplexen mit ebenen Substrukturen

2014

• Shiping Liu visits Jürgen Jost, MPI MIS Leipzig, 25 January - 2 February, 2014.
• Pavel Zalesskii (Universidade de Brasília) visits Alina Vdovina, 2 - 10 February, 15 - 20 Februay, 2014.
• Carsten Lange (TU München) visits Durham University as Grey Fellow in Epiphany Term 2014 (10 February - 28 March)
• Jakob Stix (Universitaet Heidelberg) visits Alina Vdovina, 10-15 February, 2014.
• Alina Vdovina: Groups acting on rooted trees and around, Invited Speaker, Institut Henri Poincare, 21 - 28 February, 2014.
• Alina Vdovina: Geometric Groups on the Gulf Coast, Invited Speaker, Pensacola, Florida, 27-30 March, 2014.
• Alina Vdovina: Geometry of Computation in groups, Invited Speaker, Erwin Schroedinger Institute, Vienna, 31 March - 7 April, 2014.
• Alina Vdovina visits Max Planck Institute, Bonn, April 2014.
• Shiping Liu Electrical Flows, Graph Laplacians, and Algorithms: Spectral Graph Theory and Beyond, 7-11 April, 2014.
• Feng-Yu Wang (Swansea University) visits Shiping Liu and Norbert Peyerimhoff, 11-13 May, 2014.
• George Willis (Newcastle, Australia) visits Alina Vdovina, 25-31 May, 2014.
• Alina Vdovina: Talk in the Kolloquium of Otto-von-Guericke-Universitaet Magdeburg, Institut für Algebra und Geometrie (IAG), 5 June, 2014, Title: Expanders, buildings and fake algebraic surfaces
• Riikka Kangaslampi (Aalto University) visits Alina Vdovina, end of June, 2014.
• Shiping Liu visits Jürgen Jost, MIS MPI, Leipzig, Germany, 22 June-2 July, 2014. Talk at the Oberseminar Geometry: "Cheeger constant, spectral clustering and eigenvalue ratios of Laplacian", June 23, 2014
• Shiping Liu visits Peng Pan at TU Dortmund, Germany, 3-4 July, 2014.
• Shiping Liu and Norbert Peyerimhoff visit Matthias Keller (Friedrich Schiller Universitaet Jena, Germany), 5-11 July, 2014. Both are giving talks in the Oberseminar Analysis, Geometry and Stochastik on 9 July, 2014.
• Shiping Liu and Norbert Peyerimhoff visit Ivan Veselic (TU Chemnitz, Germany), 12-20 July, 2014. Both giving talks at the Forschungsseminar Diskrete Geometrie on 15 July, 2014.
• Alina Vdovina speaker on "The 4th South Kyushu workshop on algebra", 22-25 July, 2014, Kumamoto; her title "Combinatorial structure of fake algebaric surfaces"
• Alina Vdovina on the 7th MSJ-SJ "Hyperbolic Geometry and Geometric Group Theory", 30 July - 3 August, 2014, Tokyo
• Nathan Barker (teacher of Mathematics for Comberton Village College, Cambridge, and Senior Education Resource Developer for CMEP at Department for Pure Mathematics and Mathematical Statistics, Cambridge University) visits Alina Vdovina in August 2014
• Shiping Liu visits Summer Session 2014, ZiF cooperation group "Discrete and Continuous Models in the Theory of Networks", ZiF, University of Bielefeld (Germany), 28 August-4 September. Title of talk on 29 August, 2014: "Spectral clustering via metrics of projective spaces"
• Ioannis Ivrissimtzis: 2014 Conference - Computer Graphics & Visual Computing>, 10-11 September, 2014, Leeds, presenting the paper entitled "A Geometric Approach for the Computation of Principal Directions in Point Sets"
• Alina Vdovina visits Jakob Stix in Frankfurt, 11-16 September 2014
• Alina Vdovina visits Peter Ryan in Luxembourg, 17-19 September 2014
• Carsten Lange (TU Munich) visits Shiping Liu, Norbert Peyerimhoff and Ioannis Ivrissimtzis on 15 September - 19 September, 2014.
• Shiping Liu: Algebra-Geometry Seminar Newcastle, 21 October, 2014, Title: Cheeger constant, spectral clustering and eigenvalue ratios of Laplacian
• Shiping Liu visits Prof Alexander Grigor'yan (Universität Bielefeld) and gives a talk in the Oberseminar Geometric Analysis, 17-20 November 2014
• Alina Vdovina: ``Expanders Everywhere'', Neuchatel, giving a Minicourse on Expanders, 1-5 December 2014

2015

• Shiping Liu: Winter Meeting on Bruhat-Tits buildings, Imperial College London, 6-9 January 2015
• Norbert Peyerimhoff: Analysis Seminar Maxwell Institute for Mathematical Sciences, Edinburgh, 30 January, 2015, Title: Expanders, lifts, and Ramanujan graphs
• Shiping Liu: Oberwolfach Mini-Workshop Discrete p-Laplacians: Spectral Theory and Variational Methods in Mathematics and Computer Science, 8-14 February 2015
• Alina Vdovina: Borel Seminar ``High-Dimensional Expanders 2015'', Les Diablerets, 8-13 March 2015.
• Shiping Liu visits Dr Han Xiaoli at the Tsinghau University, Bejing
• Alina Vdovina visits IHES, 1-30 April 2015
• Norbert Peyerimhoff: Seminaires Groupes et Geometrie, Geneva, 14 April, 2015, Title: Trivalent expanders, Delta-Y transformations and hyperbolic surfaces
• Shiping Liu: Spring School Discrete Ricci curvature, Paris, Institut Henri Poincare, 18-22 May 2015
• Shiping Liu visits Prof Alexander Grigoryan (Bielefeld University) from 23 May to 30 June 2015, giving the talk ``Cheeger inequalities for magnetic Laplacians'' in the Oberseminar Geometric Analysis; 21-25 June visiting Prof Jürgen Jost at the MPI MIS Leipzig
• Alina Vdovina: Talk in York, Summer ``Buildings'' (NBGGT), 27 May 2015
• Alina Vdovina: ENS Paris ``Geometric Group Theory'', 1-5 June 2015
• Shiping Liu, Norbert Peyerimhoff and Shiping Liu visit the MPI, Bonn in July 2015, to collaborate with Riikka Kangaslampi (Aalto), talks:
  • S. Liu, 7 July 2015: Eigenvalues of magnetic Laplacians on graphs and manifolds: Cheeger inequalities and Ramanujan property,
  • N. Peyerimhoff, 17 July 2015: Trivalent expanders, Delta-Y transformations and hyperbolic surfaces,
  • A. Vdovina, 24 July 2015: , Lattices, superrigidity and surfaces,
  • R. Kangaslampi, 30 July 2015: Hyperbolic triangular buildings with and without periodic planes
• Norbert Peyerimhoff: , SFB Discretization in Geometry and Dynamics , TU Munich and TU Berlin, 14 July, 2015, Title: Cheeger constants and frustration indices for magnetic Laplacians on graphs and manifolds
• Shiping Liu visits Prof Delio Mugnolo at the FernUniversität in Hagen, 15 July, 2015, giving a talk entitled ``Higher order Cheeger inequalities for discrete magnetic Laplacians''
• Shai Evra (Hebrew University) visits Alina Vdovina, 10-18 August 2015
• Vsevolod Chernishev (National Research University Higher School of Economics, Moscow) visits Norbert Peyerimhoff, 16-19 August 2015
• Carsten Lange (TU München) visits Ioannis Ivrissimtzis, Shiping Liu and Norbert Peyerimhoff, 30 August-11 September 2015
• Stefan Dantchev: British Colloquium of Theoretical Computer Science (BCTCS), Middlesex University London, 14-16 September 2015
• Stefan Dantchev: LMS Computer Science Colloquium 2015, The Royal Society, London, 17 September 2015
• Alina Vdovina: GAGTA 2015, Luminy, 14-18 September 2015
• Shiping Liu: giving a talk at Non-Combinatorial Combinatorics , Warwick University, 14-18 September 2015
• Shiping Liu: attended SIAM Conference on Applied Linear Algebra, Hyatt Regency Atlanta, Atlanta, Georgia, USA, and gave a talk in the Minisymposium "Recent Spectral Approaches to Graph Clustering" with the title: Signed Laplacians and Spectral Clustering Via Quotient Space Metrics, 26-30 October 2015
• Ioannis Ivrissimtzis visits Prof Holly Rushmeier (Yale University, Department of Computer Science), 31 October-7 November 2015
• Shiping Liu: visited Professors Józef Dodziuk and Radoslaw Wojciechowski in CUNY and gave a talk in the CUNY Graduate Center Differential Geometry Seminar, New York, NY, USA, with the title: Cheeger constants and Eigenvalue ratios of the Laplacian, 31 October-8 November 2015
• Shiping Liu: visited Dr. Afonso S. Bandeira in Department of Mathematics, MIT, Cambridge, MA, USA, 9-12 November 2015
• Shiping Liu: gave a talk in the seminar of Prof. Yaokun Wu in Department of Mathematics, Shanghai Jiao Tong University, with the title: Cheeger inequalities for signed Laplacians, 8 December 2015
• Alina Vdovina: Groups & their Applications, The Manchester-Birmingham-London-Bristol "Triangle", giving a talk at the 5th meeting: Groups and Geometry, Birkbeck, University of London, 9 December 2015
• Shiping Liu: attended FUDAN-USTC Joint Workshop on Spectral Geometry, Fudan University, Shanghai and University of Science and Technology of China, Hefei, China, and give a talk titled: Cheeger inequalities for magnetic Laplacians on graphs and manifolds, 9-13 December 2015
• Alexandre Borovik visits Alina Vdovina in Newcastle, 10-13 December 2015.

2016

• Riikka Kangaslampi (Aalto University) visits Alina Vdovina, 1-4 February, 2016.
• Alina Vdovina: invited speaker at Equations and formal languages in algebra, Les Diablerets, Switzerland, 6-10 March 2016
• Asma Hassannezhad (MPI, Bonn) visits Shiping Liu and Norbert Peyerimhoff, 7-11 March 2016.
• Alina Vdovina visits Alessandra Iozzi at the ETZ Zurich, March-May 2016.
• Michela Egidi (TU Chemnitz) visits Shiping Liu and Norbert Peyerimhoff, 20-17 May 2016.
• Workshop 2016 "Geometry and Computation on Groups and Complexes"in Newcastle, organised by S. Dantchev, A. Duncan, I. Ivrissimtzis, N. Peyerimhoff, S. Rees, A. Vdovina
• Riikka Kangaslampi (Aalto University) visits Alina Vdovina, 13-17 June, 2016.
• Alina Vdovina visits the MPI, Bonn in July 2016, to collaborate with George Daskapoulos (Brown University)
• Shiping Liu visits Prof. Dr. Matthias Keller, Institut für Mathematik, Der Universität Potsdam, 3-10 July, 2016.
• Shiping Liu attends and gives a talk in the Conference Heat Kernels and Analysis on Manifolds and Fractals, a satellite event of 7ECM, Bielefeld University, 11-16 July, 2016.
• Shiping Liu attends and gives a talk in the Banff Workshop Algebraic and Spectral Graph Theory, Banff International Research Station (BIRS), 31 July-5 August, 2016.
• Shiping Liu and Norbert Peyerimhoff attend and give talks in Workshop on discrete analysis, Fudan University, Shanghai, 13-14 August, 2016.
• Carsten Lange (TU Munich) visits Ioannis Ivrissimtzis, Shiping Liu and Norbert Peyerimhoff, 23-31 August, 2016.
• Shiping Liu attends Workshop Network Science meets Matrix Functions, Oxford University, 1 September, 2016.
• Christian Rose (TU Chemnitz) visits Shiping Liu and Norbert Peyerimhoff, 10-17 September, 2016.
• Ruben Sanchez Garcia (Southampton) visits Shiping Liu and Norbert Peyerimhoff, 19-22 September, 2016.
• David Cushing gives the talk "Bakry-Émery curvature functions of graphs" in the Algebra Seminar, University of Newcastle, 27 September, 2016.
• Alina Vdovina visit the University of California, Berkeley, 14 October-9 December, 2016.

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