
July
 December 2011
Thematic Program on Discrete Geometry and Applications
October
1721, 2011
Workshop on Rigidity and Symmetry
Organizers: 
Marston
Conder (Auckland University)
Robert Connelly (Cornell University)
Tibor Jordan (Eotvos University)
Barry Monson (University of New Brunswick) 
Egon
Schulte (Northeastern University)
Ileana Streinu (Smith College)
Asia Ivic Weiss (York University)
Walter Whiteley (York University) 

Mailing List : To receive
updates on the program please subscribe to our mailing list at www.fields.utoronto.ca/maillist
Program
Monday, October 17 
9:3010:30 
S. Guest (University of Cambridge)
Generating symmetric tensegrities (slides)

10:3011:00 
Coffee Break 
11:0012:00 
P. Fowler (University of Sheffield)
Counting with symmetry: extended versions of mobility criteria 
12:002:00 
Lunch Break 
2:002:25 
E. Ross (Fields Institute)
The rigidity of graphs on the torus 
2:302:55 
T. Nixon (The Fields Institute)
Rigidity, Circuits and Global Rigidity on the Cylinder 
3:003:30 
Coffee Break 
3:303:55 
V. Alexandrov (Novosibirsk State University)
The Dehn invariants of the Bricard octahedra 
4:004:25 
J. Owen (Siemens PLM Software)
Radical/Quadratic Realisations of a Rigid Graph 
Tuesday, October 18 
9:3010:30 
B. Schulze (Fields Institute)
Counts for predicting symmetric motions in frameworks with
applications to protein flexibility 
10:3011:00 
Coffee Break 
11:0012:00 
L. Theran (Freie Universität Berlin)
Generic rigidity of crystallographic frameworks 
12:002:00 
Lunch Break 
2:002:25 
C. Borcea (Rider University)
Deformations of crystal frameworks (slides) 
2:302:55 
J. Malestin (Temple University)
Generic combinatorial rigidity of periodic frameworks 
3:003:30 
Coffee Break 
3:304:30 
I. Streinu (Smith College)
Periodic bodyandbar frameworks 
4:304:55 
H. Mitschke (University
ErlangenNuremberg)
Floppy frameworks as models for auxetic materials 
Wednesday, October 19 
9:3010:30 
S. Power (Lancaster University)
Space group and point group symmetry equations for the BorceaStreinu
rigidity matrix of a crystal framework 
10:3011:00 
Coffee Break 
11:0012:00 
A. Mednykh (Sobolev Institute of Mathematics)
Volumes of Polyhedra in Hyperbolic and Spherical Spaces (slides) 
12:002:00 
Lunch Break 
2:002:25 
S. Apel (Technische Universitaet
Muenchen)
An Invariant theoretic view on 10 points on a cubic 
2:302:55 
B. Servatius (Worcester Polytechnic Institute)
Point/Line Configurations and their Realizability 
3:003:30 
Coffee Break 
3:303:55 
N. Dolbilin (Sobolev Institute of Mathematics)
Parallelohedra and a Walk Around the Voronoi Conjecture 
4:004:25 
D. Richter (Western Michigan University)
How to Draw an EdgeColored Graph 
4:304:55 
M. Owen (The Fields Institute)
Geodesics in CAT(0) Cubical Complexes 
Thursday, October 20 
9:3010:30 
E. Schulte (Northeastern University)
TwoOrbit Polyhedra in Ordinary Space (slides) 
10:3011:00 
Coffee Break 
11:0012:00 
I. Hubard (Universidad Nacional Autónoma de
México)
Equivelar 4twistoids I 
12:002:00 
Lunch Break 
2:002:25 
M. Mixer (Fields Institute)
Equivelar 4Twistoids II 
2:302:55 
M. Klambauer (University of Toronto)
Equivelar Maps on the Klein Bottle, and a Higher Dimensional
Generalization 
3:003:30 
Coffee Break 
3:303:55 
M. Baake (University of Bielefeld)
Aperiodic Tilings: Notions and Properties I 
4:004:25 
U. Grimm (Open University)
Aperiodic Tilings: Notions and Properties II 
4:304:55 
M. Petitjean (Université Paris 7)
Chirality and Symmetry Measures: Some Open Problems 
Friday, October 21 
9:3010:30 
M. Conder (University of Auckland)
Large Groups Acting on Surfaces/Structures of Given Genus,
and the Symmetric Genus of a Given Group 
10:3011:00 
Coffee Break 
11:0012:00 
D. Pellicer (Fields Institute)
Regular Polygonal Complexes in Space 
12:002:00 
Lunch Break 
2:002:25 
J. De Saedeleer (Université Libre de Bruxelles)
The Geometry of the Groups PSL(2,q) (slides) 
2:302:55 
R. Jajcay (Indiana State University)
Restricting the Degree/Diameter and Cage Problems to VertexTransitive
Graphs 
3:003:30 
Coffee Break 
3:303:55 
A. Kumar  (MIT)
Rigidity of Spherical Codes, and Kissing Numbers in High
Dimensions 
4:004:25 
S. Apel (Technische Universitaet Muenchen)
GCycles  Powerful and Surprisingly Simple Objects 


Participants
Full Name 
University/Affiliation 
Alexandrov, Victor 
Sobolev Institute of Mathematics 
Andrews, Rob 
(no affiliation) 
Apel, Susanne 
Technische Universitaet Muenchen 
Baake, Michael 
University of Bielefeld 
Bokowski, Jürgen 
TU Darmstadt 
Borcea, Ciprian 
Rider University 
Cheng, Jialong 
University of Florida 
Connelly, Robert 
Cornell University 
Crapo, Henry 
E.H.E.S.S., Paris 
Demaine, Erik 
Massachusetts Institute of Technology 
Deza, Michel 
École Normale Supérieure & JAIST 
Fowler, Patrick 
University of Sheffield 
Grimm, Uwe 
Open University 
Grünbaum, Branko 
University of Washington 
Guest, Simon 
University of Cambridge 
Halevy, Itamar 
no affiliation 
Hempel, Maria 
ETH Zürich 
Hubard, Isabel 
Universidad Nacional Autónoma de México 
Izmestiev, Ivan 
Technische Universität Berlin 
Jackson, Bill 
Queen Mary, University of London 
Jajcay, Robert 
Indiana State University 
Jordán, Tibor 
Eötvös Loránd University 
Kalai, Gil 
Hebrew University 
Kaszanitzky, Viktoria 
Eotvos University 
Malestein, Justin 
Temple University 
McMullen, Peter 
University College London 
Mednykh, Alexander 
Sobolev Institute of Mathematics 
Mitschke, Holger 
Universität ErlangenNürnberg 
Mixer, Mark 
The Fields Institute 
Monson, Barry 
University of New Brunswick 
Nedela, Roman 
Matej Bel University 
Nixon, Anthony 
The Fields Institute 
Owen, John 
Siemens PLM Software 
Owen, Megan 
The Fields Institute 
Pellicer, Daniel 
The Fields Institute 
Petitjean, Michel 
Université Paris 7 
Pilaud, Vincent 
Fields Institute and Université Paris 7 
Power, Stephen 
Lancaster University 
Richter, David 
Western Michigan University 
Ross, Elissa 
The Fields Institute 
Schulte, Egon 
Northeastern University 
Schulze, Bernd 
The Fields Institute 
Schürmann, Achill 
University of Rostock 
Senechal, Marjorie 
Smith College 
Servatius, Brigitte 
Worcester Polytechnic Institute 
Servatius, Hermann 
Worcester Polytechnic Institute 
Shai, Offer 
Tel Aviv University 
Sitharam, Meera 
University of Florida 
Sljoka, Adnan 
York University 
Streinu, Ileana 
Smith College 
Tanigawa, Shinichi 
Kyoto University 
Theran, Louis 
Freie Universität Berlin 
Thorpe, Michael 
Arizona State University 
Valenta, George 

Wang, Menghan 
University of Florida 
Wegner, Franz 
Heidelberg University 
Weiss, Asia Ivic 
York University 
Whiteley, Walter 
York University 
Ziegler, Günter M. 
FU Berlin 
Postdoctoral Fellows and Program Visitors
Postdoctoral fellowship
applications
We will support a number of Fields postdocs for the duration of
the program, as well as offer support towards a visitors' program,
including visiting Ph.D. students To apply for a postdoctoral fellowship
see postdoctoral web page.
Program Participants requesting support
or office space
All scientific events are open to the mathematical sciences community.
Visitors who are interested in office space or funding are
requested to apply by filling out the application
form. Additional support is available (pending NSF funding)
to support junior US visitors to this program.
Fields scientific programs are devoted to research in the mathematical
sciences, and enhanced graduate and postdoctoral training opportunities.
Part of the mandate of the Institute is to broaden and enlarge the
community, and to encourage the participation of women and members
of visible minority groups in our scientific programs.
For additional information contact thematic(PUT_AT_SIGN_HERE)fields.utoronto.ca
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