

Talks
On Mathieu Moonshine
July 1418, 2014,
30th International Colloquium on Group Theoretical Methods in Physics,
Ghent, Belgium
An instance of mirror symmetry on K3
June 1520, 2014,
Workshop on Quantum Curves and Quantum Knot Invariants,
Banff, Canada
Mathieu Moonshine on K3
June 14, 2014,
Workshop on CalabiYau Manifolds and their Moduli,
Satellite Meeting to the StringMath 2014,
Edmonton, Canada
The elliptic genus of K3: From index theory to conformal field
theory I and II
May 2930, 2014,
Workshop on Recent Developments in Moonshine,
Gothenburg, Sweden
The elliptic genus of K3 and how it comes in useful in quantum field theory
May 24, 2014,
Felix Klein Colloquium, Leipzig University, Germany
The elliptic genus of K3 and CFT
April 1418, 2014,
International Workshop on Mock Modular Forms and Physics,
IMSc, Chennai, India
From conformal geometry to conformal field theory
January 29, 2014,
Mathematics Colloquium, University of Potsdam, Germany
Moonshine  or how to distill geometry from conformal field theory
January 14, 2014,
Mathematics Colloquium, University of Erlangen, Germany
Symmetrysurfing the moduli space of Kummer K3s II
September 6, 2013,
Program in Mock Modular Forms, Moonshine, and String Theory,
Simons Center for Geometry and Physics,
Stony Brook, USA
Lecture Course: K3 Surfaces: Geometry, conformal field theory and
number theory
August 1923, 2013,
GEOQUANT 2013 School on Geometry and Quantization,
ESI Vienna, Austria
Lecture Course: Algebraic Geometry and Conformal Field Theory
July 1531, 2013,
Summer School on Geometric, Algebraic and Topological Methods for
Quantum Field Theory,
Villa de Leyva, Colombia
Moonshine in Mathematics and String Theory
July 4, 2013,
Bethe Colloquium, Physics Institute, Bonn, Germany
The elliptic genus of K3
May 2427, 2013,
Bayrischzell Workshop 2013 "Quantization, topological models
and
generalized geometries", Bayrischzell, Germany
Mathieu Moonshine for K3
April 23, 2013,
Integrable Systems and Mathematical Physics Seminar, University of Glasgow, Scotland
A twist in the Mathieu Moonshine Story
April 7, 2013,
Southeast Regional Math/Strings Meeting, Duke University, USA
A binary view on Kummer K3s and MathieuMoonshine
January 21, 2013,
Mathematics Colloquium, University of Stuttgart, Germany
A constructive approach to Mathieu Moonshine
November 23, 2012,
Heilbronn Day "Modular Forms, Geometry and Physics",
ICMS Edinburgh, UK
A binary view on Kummer K3s and M_{24}Moonshine
November 15, 2012,
Mathematics Colloquium, University of Geneva, Switzerland
Mathematical foundations of conformal field theory and
applications
(lecture series),
October 26  November 4, 2012,
COPROMAPH International School,
Cotonou, Benin
Geometric aspects of Mathieu moonshine
September 37, 2012,
Heilbronn Workshop on String Theory and Arithmetic Geometry,
Bristol, UK
Large subgroups of M_{24} form overarching symmetry groups of K3
July 1621, 2012,
StringMath 2012,
Bonn, Germany
Singularitätentheorie als geometrischer Zugang zur
topologischen Quantenfeldtheorie
July 10, 2012,
Augsburger Mathematisches Kolloquium,
Augsburg, Germany
A geometric approach to topological quantum field theory
July 1, 2012,
Joint EMS/EWM Survey Lectures,
European Women in Mathematics at the 6ECM, Krakow, Poland
Singularities and topological quantum field theories
June 28, 2012,
Mathematisches Kolloquium,
Universität Münster, Germany
On symplectic automorphisms of K3 surfaces and their associated
conformal field theories
June 48, 2012,
Conference on
Symplectic Geometry and Mathematical Physics,
Beijing Center for Mathematical Physics, Beijing, China
Von Singularitätentheorie zur topologischen Quantenfeldtheorie
May 31, 2012,
Gemeinsames Kolloquium der Mathematik und Physik,
Universität Heidelberg, Germany
The overarching finite symmetry group of Kummer surfaces in
the Mathieu group M_{24}
May 23, 2012,
KölnBonn Oberseminar Zahlentheorie und Physik,
MPI Bonn, Germany
A geometric approach to topological quantum field theories
April 4, 2012,
HausdorffKolloquium,
Mathematics Institute, Universität Bonn, Germany
On symmetries of K3, its associated CFTs and the Mathieu group M_{24}
February 27, 2012,
Oberseminar Algebraische Geometrie,
Universität Zürich, Switzerland
Von Katastrophen und anderen Singularitäten
January 17, 2012,
Didaktisches Seminar,
Freiburg, Germany
On K3 surfaces in physics and geometry
December 9, 2011,
MathematischPhysikalisches Kolloquium,
Freiburg, Germany
Singularitäten und topologische Quantenfeldtheorien
December 7, 2011,
Mathematisches Kolluquium,
TU München, Germany
Symmetries of K3 and the automorphisms of the Golay code
November 28, 2011,
Oberseminar Differentialgeometrie,
Münster, Germany
Kummer K3 surfaces and the automorphism group of the Golay code
November 1415, 2011,
Trends and Perspectives in Mathematics,
Tel Aviv, Israel
K3 surfaces and the Mathieu group M_{24}
October 30November 4, 2011,
Chern Centennial Conference,
MSRI Berkeley, USA
On catastrophes and related singularities
October 68, 2011, International SimTech Symposium
Partial
Differential Equations: Theory, Applications, Simulations,
Stuttgart, Germany
Topological field theories and integrable systems
July 2529, 2011, The
4th International Workshop on Nonlinear Mathematical Physics and
The 11th National Conference on Integrable Systems,
Wuhan, China
K3 Flächen, deren Symmetrien und was sie mit Codes zu tun haben
July 13, 2011, Mathematisches Kolloquium,
EberhardKarlsUniversität Tübingen, Germany
From the K3lattice to the (A_{1})^{24}Niemeier
lattice
July 79, 2011, Mathieu Moonshine Meeting, ETH Zurich, Switzerland
K3 Flächen, deren Symmetrien und was sie mit Codes zu tun haben
June 17, 2011, Mathematisches Kolloquium,
GoetheUniversität Frankfurt, Germany
From the Golay Code to K3surfaces and their associated conformal field theories
April 28, 2011,
Maths and Appications Sussex Seminar at the University of Sussex, UK
Die Geometrie von Singularitäten und Quantenfeldtheorien
April 12, 2011,
Tagung deutschsprachiger Mathematikerinnen 2011
at the RWTH Aachen, Germany
Symmetries of K3 in M_{24}: I Geometry
February 28  March 18, 2011,
School and Conference on Modular Forms and Mock Modular Forms and their Applications in Arithmetic, Geometry and Physics
at the ICTP, Trieste, Italy
Von K3 bis M_{24}
January 20, 2011,
Mathematics Colloquium,
University of Mainz, Germany
Lattices, their symmetries, and how they affect conformal field theories on K3
December 20, 2010,
Theoretical Physics Seminar,
Londrina University, Brazil
The symmetries of K3 surfaces and their implementation in conformal field theory
December 1317, 2010,
Second Latin Congress on
Symmetries in Geometry and Physics
in Curitiba, Brazil
What is a K3 surface  and how can it be used in physics?
December 3, 2010,
Deutsches Haus für Wissenschaft und Innovation des DAAD,
Moscow, Russia
On Kummer surfaces, the Mathieu group M_{24},
and conformal field theory
November 24, 2010,
Algebraic and Geometry Seminar,
University of Bristol, UK
On Kummer surfaces, the Golay code, and conformal field theory
November 9, 2010,
Algebraic Geometry Seminar,
Università di Milano, Italy
On the symmetries of K3 surfaces
September 13  16, 2010,
Courant Colloquium 2010,
Göttingen, Germany
On the geometry of singularities in quantum field theory
August 19  27, 2010,
International Congress of Mathematicians 2010,
Hyderabad, India
Quantum field theories and the geometry of singularities
July 26  30, 2010,
The XXVIII International Colloquium on GroupTheoretical Methods in Physics,
Newcastle, UK
Von Singularitäten zu topologischen Quantenfeldtheorien
July 13, 2010,
Fakultätskolloquium der Fakultät Mathematik und Physik,
LeibnizUniversität Hannover, Germany
On K3 surfaces and their applications in physics
June 27  July 3, 2010,
XXIX Workshop on Geometric Methods in Physics,
Bialowieza, Poland
K3 erklimmen? Von der Basis in der klassischen Optik bis zum Gipfelpanorama in Geometrie und Quantenfeldtheorie
May 7, 2010,
Lecture series "frauen, die forschen",
University of Kiel, Germany
TQFT & singularities from a conformal field theorist's point of view
April 15, 2010,
COW seminar
in Cardiff, Wales
On singularities and conformal field theory
April 12, 2010,
Mathematics Colloquium, University of Durham, UK
On singularities and modularity
March 1419, 2010,
Global Analysis and Automorphic Forms  On the Occasion of the 60th Birthday of Werner Müller
in Jerusalem, Israel
Conformal field theories on BorceaVoisin 3folds
December 1718, 2009,
Workshop on Algebraic and Topological Aspects of Dbranes
in Würzburg, Germany
Eine mathematische Entdeckungsreise zu K3
November 25, 2009,
Kolloquium des Fachbereiches Mathematik,
TU Darmstadt, Germany
Encounters with conformal field theory
November 2021, 2009,
Advances in Theoretical Physics
 A conference in honour of
Professor Werner Nahm in Dublin, Ireland
A Hiker's Guide to K3
November 4, 2009,
Dresdener Mathematisches Seminar, Dresden, Germany
How to attach gauge theory data to elliptic fibrations
September 1418, 2009,
Workshop on Algebraic Geometry and Physics (WAGP 2009)
Representations,
Lie Theory and Physics
in Maresias, Brazil
Asymptotic analysis for unitary conformal field theories
September 711, 2009,
Third International Conference on Geometry and Quantization
GEOQUANT
at the University of Luxembourg, Luxembourg
(0,4) lessons for (0,2)
August 1721, 2009,
(0,2) Mirror Symmetry and Quantum Sheaf Cohomology, Potsdam,
Germany
A discovery tour to K3
August 5, 2009,
Mathematics Colloquium, St. Patrick's college, Dublin, Ireland
The symmetries of K3, and how to build conformal field theories
from them
July 1924, 2009,
Symmetries in science, Bregenz,
Austria
An explicit construction of superconformal field theories on certain CalabiYau 3folds
July 69, 2009,
XIII International Conference
Symmetry Methods in Physics, Dubna, Russia
Geometrische Aspekte von Quantenfeldtheorien
June 27, 2009,
Mathematics Institute, TU Munich, Germany
Geometrische Anwendungen von Quantenfeldtheorien
June 19, 2009,
Mathematics Institute, Freiburg i.Br., Germany
The geometry of conformal field theory
June 820, 2009,
RTG Graduate Summer School
Geometry of Quantum Fields and Strings, University of Pennsylvania, Philadelphia, USA
Lecture series on K3 surfaces and CFT
April 68, 2009,
Graduate workshop:
K3
surfaces and multigraded rings, University of Warwick, UK
A classification of a family of free fermionic orbifold models
March 30, 2009,
DukeUNC String theory seminar, UNC Chapel Hill, USA
How are intersection numbers governed by representation theory?
January 20, 2009,
Oberseminar Geometrie, LMU München, Germany
From dualities to intersection theory,
January 16, 2009,
Scottish topology colloquium, University of Edinburgh, Scotland
Applications of a stringstring duality
December 1522, 2008,
First Cuban Congress on Symmetries in Geometry and Physics,
Havana, Cuba
Symmetrien und die Kunst, sie anzuwenden
October 23, 2008,
public lecture for the Year of Mathematics,
Zeughaus Augsburg, Germany
On explicit SCFT constructions for certain CalabiYau varieties
September 17, 2008,
Korean Institute of Advanced Studies,
Seoul, South Korea
On orbifolds and free fermion constructions
September 812, 2008,
International Workshop
From integrable structures to topological strings and back,
SISSA, Trieste, Italy
How are intersection numbers governed by representations of Lie algebras?
August 1319, 2008,
XXVII Intl. Colloquium on Group Theoretical Methods in Physics,
Yerevan, Armenia
Die Geometrie topologischer Quantenfeldtheorien
July 4, 2008,
Honorary speech at the annual celebration of the University of Augsburg,
Germany
On some implications of stringstring dualities
June 30  July 4, 2008,
The manifold geometries of quantum field theory,
Hausdorff Center for Mathematics,
Bonn, Germany
Extending the geometry of certain CalabiYau varieties
May 1213, 2008,
Irish Geometry Conference 2008,
IT Tralee, Ireland
Conformal field theory: From physics to mathematics
April 29, 2008,
Seminar zur Theorie der kondensierten Materie,
Physikalisches Institut, Augsburg, Germany
From dualities to geometry
March 1420, 2008,
International Conference on Geometry and Analysis on Manifolds,
Santa Barbara, USA
How to implement special properties of K3 surfaces in conformal field theory
February 15, 2008,
Algebraic and complex geometry seminar,
Osaka, Japan
How to lift a construction by Hiroshi Inose to Conformal Field Theory
February 12, 2008,
IPMU Seminar,
University of Tokyo, Japan
Eine mathematische (Ein)führung zu K3
February 1, 2008,
Bonner Mathematisches Kolloquium,
Bonn, Germany
Geometry and beyond for K3 and one of its higher dimensional cousins
January 17, 2008,
ZMP Kolloquium,
University of Hamburg, Germany
On K3surfaces and beyond  from a geometer's and a conformal field
theorist's point of view
November 22, 2007,
Oberseminar Algebraische Geometrie,
Hanover, Germany
How do twisted indices on K3 relate to intersection numbers in CalabiYau threefolds?
October 26, 2007,
Workshop in memory of Andrei Tyurin,
Steklov Institute, Moscow, Russia
Schritt für Schritt auf dem Weg zu K3
October 23, 2007,
Antrittsvorlesung, University of Augsburg,
Germany
Quantum field theory as an aid to geometers
September 24, 2007,
Mathematics seminar,
IISc Bangalore, India
Quantum field theory as an aid to geometers
September 19, 2007,
Mathematics seminar,
IIT Bombay, India
Quantum field theory as an aid to geometers
August 29  September 2, 2007,
ICTAMI07,
Alba Iulia, Romania
On the relation between Conformal Field Theory and Geometry
August 2631, 2007,
International Conference on Symmetries in String Theory,
Ascona, Switzerland
The topology and geometry of certain quotient singularities 
some new techniques
August 1925, 2007,
The Eighth International Workshop on Differential Geometry and its
Applications,
Cluj, Romania
What do quartic K3 surfaces have in common with orbifold limits of K3?
July 3, 2007,
Oberseminar Geometrie, LMU München, Germany
A reversal of sigma model constructions
June 2430, 2007,
Symmetry in Nonlinear Mathematical Physics,
Kiev, Ukraine
A reversal of sigma model constructions
June 1824, 2007,
VII. International Workshop Lie Theory and its Applications in Physics,
Varna, Bulgaria
'Nearly attractive' K3surfaces  describing and generalizing
KählerEinstein metrics
on them
June 6, 2007,
Oberseminar Globale Analysis, Bonn, Germany
Eine elementare Diskussion von TDualität und Spiegelsymmetrie
May 5, 2007,
Mathematisches Kolloquium,
Regensburg, Germany
From dualities to geometry
April 1619, 2007,
British Mathematical Colloquium 2007,
Swansea, Wales
From index theory to intersection numbers
April 814, 2007,
International Conference on Geometry and Analysis on Manifolds,
Tianjin, China
The imprint of dualities in complex geometry
March 2530, 2007,
Minisymposium Globale Analysis,
DMV Jahrestagung 2007, HU Berlin, Germany
How to construct deformations of the (2)^{4} Gepner model on smooth
K3 surfaces
March 5, 2007,
Theory Seminar,
CEA Saclay, France
K3 surfaces, and how to construct associated conformal field theories
January 24, 2007,
Forschungsseminar "Geometrische Analysis und Spektraltheorie'',
HU Berlin, Germany
Spezielle quartische K3Flächen und assoziierte 'metageometrische'
Strukturen
December 14, 2006,
Kolloquium des GK ατμγ,
Münster, Germany
Approaching Geometry from Conformal Field Theory
November 16, 2006,
Mathematical Physics Seminar,
Zürich University, Switzerland
Verallgemeinerte LaplaceOperatoren als Schlüssel zur
geometrischen Dekodierung konformer Feldtheorien
October 7, 2006, Workshop "Anwendbare Analysis",
Stuttgart, Germany
Towards the boundary of spaces of conformal field theories
July 27, 2006, IGA satellite workshop to
Mathematics of String Theory,
Adelaide, Australia
A family of superconformal field theories hosting all "very attractive"
relatives of the (2)^{4} Gepner model
July 21, 2006, Workshop on Mathematics of String Theory,
Canberra, Australia
Anomaly cancellation in the light of heterotic  type IIA string duality
July 1417, 2006, minicourse at the Instructional Program
of Mathematics of String
Theory,
Canberra, Australia
The Monster and String Theory
May 24, 2006, LIMS Evening lecture,
Lighthill Insitute of Mathematical Sciences,
London, UK
A scenic view of K3
May 19, 2006,
Mathematics Colloquium,
University of Kent, UK
"Nearly attractive" K3 surfaces and associating SCFTs to them
May 4, 2006,
Algebra Seminar,
Kansas State University, USA
Z_{4} orbifold limits of K3 and a family of smooth quartic K3s:
A nonclassical duality
December 1, 2005,
DukeUNC String theory seminar,
Duke University, USA
A duality between "nearly attractive" quartic K3s and Z_{4}
orbifold limits of K3
November 16, 2005,
Geometry Seminar,
Boston University, USA
On some quartic K3 surfaces, their natural metrics, and their
natural associated SCFTs
August 2026, 2005,
XXIII Int. Conf. on Differential Geometric Methods in Theoretical Physics,
Tianjin, China
Anomalien  eine Anwendung klassischer Indexsätze im Rahmen nichtklassischer
Dualitäten
July 8, 2005,
Mathematics Institute,
Augsburg, Germany
On a family of smooth algebraic K3 surfaces and their associated CFTs
May 1820, 2005, Journées de géométrie
algébrique,
Lille, France
How to construct SCFTs associated to a family of smooth quartic K3 surfaces
May 4, 2005,
Triangle Seminar London, UK
A survey of K3 from a conformal field theorist's point of view
February 7, 2005,
Dublin Theoretical Physics Colloquium, School of Mathematics,
Trinity College Dublin, Ireland
Approaching geometry through conformal field theory
January 27, 2005,
Warwick theory group seminar, Department of Physics,
University of Warwick, UK
On the "very attractive" relatives of the Fermat quartic
and conformal field theories associated to them
December 1, 2004,
Deformation theory seminar, Department of Mathematics,
University of Pennsylvania, Philadelphia, USA
Endliche Spiegelungsgruppen und die Allgegenwart von
ADEKlassifikationen
November 19, 2004,
Kolloquiumsreihe der Mathematischen Gesellschaft Göttingen,
Germany
K3: Eine mathematische Wanderung von Geometrie zu konformer Feldtheorie
und zurück
October 21, 2004,
Kolloquiumsreihe der Mathematischen Gesellschaft Göttingen,
Germany
Conformal field theories, their limits and their geometric
interpretations
October 1, 2004,
Math/Physics seminar,
University of Pennsylvania, Philadelphia, USA
From large level to large volume limits and their geometric
interpretations
September 2225, 2004,
6th Bologna Workshop on CFT and Integrable Models,
Bologna, Italy
On a family of SCFTs associated to quartic K3 surfaces
September 610, 2004,
Workshop on Complex Geometry in Physics,
ICMS Edinburgh, Scotland
Friendly giant meets pointlike instantons? On a new conjecture by John McKay
July 513, 2004, Moonshine the first quarter centry and beyond,
ICMS Edinburgh, Scotland
The 'very attractive' relatives of the (2)^{4} Gepner model
June 9, 2004,
9th meeting of the North British Mathematical
Physics Seminar,
York, UK
On degenerating sequences of CFTs and their geometric interpretation
May 20, 2004,
Workshop on Geometry and duality in string theory,
Oberwolfach, Germany
On degeneration phenomena in geometry and conformal field theory
April 29  May 3, 2004,
lecture series presented at the ESI workshop Mathematical and physical
aspects of branes in CalabiYau spaces,
Vienna, Austria
From geometry to CFT and back to geometry
March 18, 2004,
Theoretical Particle Physics Seminar,
DIAS Dublin, Ireland
On conformal field theories associated to "very attractive'' K3 surfaces
November 3, 2003,
Geometry/topology seminar,
Glasgow, Scotland
Orbifold constructions of K3,
and
Geometric interpretations of conformal field theories associated to K3
September 17 and 18, 2003,
MathPhysics Joint Seminar,
University of Pennsylvania, Philadelphia, USA
The many routes to K3
September 16, 2003,
Math/Physics Colloquium,
University of Pennsylvania, Philadelphia, USA
Decoding the geometry of conformal field theories
September 11, 2003,
Mathematics Colloquium,
UNC Chapel Hill, USA
A
story of K3
September 8, 2003,
Physics Colloquium,
UNC Chapel Hill, USA
Conformal field theory and geometry of strings: Some introductory remarks,
and
Conformal field theories and their geometric interpretations
June 16 and 19, 2003,
Dipartimento di Fisica,
Università di Pisa, Italy
Conformal field theory on K3: The Fermat quartic
May 14, 2003,
Geometry Seminar,
Bath, UK
Geometric interpretation of conformal field theories: A (degenerate) example
May 1, 2003,
Geometry Seminar,
University of Edinburgh, Scotland
CFT on K3 and an application of ShiodaInose structures
March 921, 2003,
Frontiers in Number Theory, Physics and Geometry, École de physique des Houches,
Les Houches, France
Ascent to K3 by CFT
November 2225, 2002,
London Mathematical Society Regional Meeting  Wales 2002,
Gregynog, Wales
Conformal field theory on K3: A status report
November 18, 2002,
String theory seminar,
Mathematical Institute,
Oxford, UK
Aspects of mirror symmetry on K3
June 2428, 2002,
EuroConference on
Higher
dimensional complex geometry,
Cambridge, UK
A hiker's view of K3: Geometric aspects of conformal field theory
June 10, 2002,
Isaac Newton Institute Seminar,
Cambridge, UK
Orbifold constructions of K3: SCFT vs. geometry
May 24, 2002,
The Third ABCKLM Network Meeting,
Cambridge, UK
Geometric aspects of CFT on K3
April 812, 2002,
Workshop on
String Theory
and Complex Geometry,
Bad Honnef, Germany
Strings on lowdimensional CalabiYau manifolds: A geometric approach,
and Strings on K3: Orbifold constructions
March 19 and April 19, 2002,
series of talks presented at the "Algebraic Geometry" and
"Physically inspired Mathematics" Seminars at the
Department of Mathematics,
UNC Chapel Hill, USA
Geometry and conformal field theory for orbifold limits of K3
February 13 and 14, 2002,
Theory group seminar at the Enrico
Fermi Institute, University of Chicago, and BCDE Seminar at the
University of Illinois at UrbanaChampaign, USA
Aspects
of mirror symmetry for orbifold CFTs on K3
(abstract,
transparencies)
January 24, 2002,
DukeUNC String Theory Seminar,
UNC Chapel Hill, USA
Mirror symmetry on Kummer type K3 surfaces. An overview
November 15, 2001,
Seminar on Topological Quantum Field Theory,
MPI für Mathematik,
Bonn, Germany
Aspects of mirror symmetry for orbifold limits of K3
November 7, 2001,
Theoretical Physics Seminar at the
Mathematics Department,
King's College,
London, UK
Aspects of N=(4,4) SCFT on K3, I and II:
Mirror symmetry on Kummer type K3 surfaces
October 31 and November 1, 2001,
Workshop on
Mathematical Aspects of String Theory,
Erwin Schrödinger Institut,
Vienna, Austria
Orbifold CFT on K3 and applications to mirror symmetry
July 20, 2001,
AG Darstellungstheorie, Mathematics Institute,
Freiburg i.Br., Germany
Geometric aspects of conformal field theory
July 16, 2001,
Mathematisches Kolloquium für Analysis,
Stuttgart, Germany
Mirror symmetry on Kummer type K3 surfaces
July 12, 2001,
Special Seminar in the Maths Department,
Durham, UK
Orbifold
conformal field theories on K3
May 48, 2001,
Workshop on
"Mathematical Aspects of
Orbifold String Theory",
Madison, Wisconsin, USA
Consistency of Z_{M} orbifold conformal field theories
on K3
October 12, 2000,
DukeUNC String Theory Seminar,
UNC Chapel Hill, USA
From the torus to K3: Orbifold conformal field theories
August 17, 2000,
Seminar on
Topological
Quantum Field Theory,
MPI für Mathematik,
Bonn, Germany
Conformal field theory: Z_{M} Orbifolds in the moduli space
of conformal field theories with c=6
July 20, 2000,
Oberseminar zur Algebra,
Stuttgart, Germany
Moduli of CFT on K3. II: Superconformal field theories
June 29, 2000,
Seminar on Topological
Quantum Field Theory,
MPI für Mathematik,
Bonn, Germany
(Crystallographic) orbifold conformal field theories
March 6, 2000,
Specialist Mathematical Physics Monday's Seminar,
York, UK
Z_{2} Orbifolds in the moduli space of N=(4,4)
superconformal field theories with central charge c=6
March 3, 2000,
Friday Lunchtime Seminar in the Maths Department,
Durham, UK
A Hiker's guide to K3  Aspects of N=(4,4)
superconformal field theory with central charge c=6
January 711, 2000,
Workshop on
"Recent developments in string theories,
conformal field theories and integrable
models from the previous millennium",
Tel Aviv, Israel
Aspects of conformal field theory on K3
April 1824, 1999,
Conference on Mathematical Aspects of String Theory,
Oberwolfach, Germany
Kritische Metriken bzgl. analytischer RaySinger Torsion und
Quillenmetrik
February 13, 1997,
Forschungsseminar "Geometrische Analysis und Spektraltheorie'',
HU Berlin, Germany
Regularized determinants of Laplacians and RaySinger analytic
torsion
October 911, 1996,
Conference on "Analysis, Numerics and Applications of Differential and
Integral Equations", Stuttgart, Germany
