AMS Sectional Meeting Program by Special Session
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2001 Spring Western Section Meeting
Las Vegas, NV, April 2122, 2001
Meeting #965
Associate secretaries:
Bernard Russo, AMS
brusso@math.uci.edu
Special Session on Physical Knotting and Unknotting

Saturday April 21, 2001, 8:00 a.m.10:50 a.m.
Special Session on Physical Knotting and Unknotting, I
Room 215, Classroom Building Complex C, Classroom Building Complex C
Organizers:
Jorge Alberto Calvo, North Dakota State University jorge_calvo@ndsu.nodak.edu
Kenneth C. Millett, University of California Santa Barbara millett@math.ucsb.edu
Eric J. Rawdon, Chatham College rawdon@chatham.edu

8:00 a.m.
Upper Bounds on Linking Numbers of Thick Links.
Yuanan Diao*, UNC Charlotte
Claus Ernst, Western Kentucky Univ.
Jance Van E Rensburg, York University
(9655733)

8:30 a.m.
On the gyration radius of random knots and its critical exponent.
Tetsuo Deguchi*, Department of Physics, Faculty of Science, and Graduate School of Humanities and Sciences, Ochanomizu University
Miyuki K Shimamura, Department of Physics, Faculty of Science, and Graduate School of Humanities and Sciences, Ochanomizu University
(9656568)

9:00 a.m.
Optimal shapes of elastic filaments with finite thickness.
Oscar Gonzalez*, University of Texas, Austin
(96574167)

9:30 a.m.
Localization of breakage points in knotted strings.
Piotr Pieranski, Poznan University of Technology
Sandor Kasas, University of Lausanne
Giovanni Dietler*, University of Lausanne
Jacques Dubochet, University of Lausanne
Andrzej Stasiak, University of Lausanne
(9657467)

10:00 a.m.
Predicting Optimal Lengths of Random Knots.
Akos Dobay, University of Lausanne/Laboratory of Ultrastructural Analysis
PierreEdouard Sottas, Swiss Federal Institute of Technology/Center for Neuromimetic Systems
Jacques Dubochet, University of Lausanne/Laboratory of Ultrastructural Analysis
Andrzej Stasiak*, University of Lausanne/Laboratory of Ultrastructural Analysis
(96592101)

10:30 a.m.
Ideal trefoil knot.
Piotr Pieranski*, Poznan University of Technology
Sylwester Przybyl, Poznan University of Technology
(96551177)

Saturday April 21, 2001, 3:00 p.m.6:20 p.m.
Special Session on Physical Knotting and Unknotting, II
Room 215, Classroom Building Complex C, Classroom Building Complex C
Organizers:
Jorge Alberto Calvo, North Dakota State University jorge_calvo@ndsu.nodak.edu
Kenneth C. Millett, University of California Santa Barbara millett@math.ucsb.edu
Eric J. Rawdon, Chatham College rawdon@chatham.edu

3:00 p.m.
Infinitesimally Locked Linkages with Applications to Locked Trees.
Robert Connelly, Cornell University
Erik D Demaine*, University of Waterloo
G\"unter Rote, Freie Universit\"at Berlin
(96551168)

3:30 p.m.
Two recent results on flipping and flipturns.
Pat Morin*, McGill University
(96551183)

4:00 p.m.
Convexifying Polygons in 3D: A Survey.
Michael Soss, McGill University
Godfried T Toussaint*, McGill University
(96551108)

4:30 p.m.
Knotting in Adsorbing Lattice polygons.
Buks Janse van Rensburg*, Mathematics and Statistics, York University
(96582118)

5:00 p.m.
Examples of Lattice Links and Knots.
Claus Ernst*, Western Kentucky University
Marnie Phipps, University of Northern Colorado
Jance Van E Rensburg, York University
(9655452)

5:30 p.m.
On the classification of rational knots.
Sofia Lambropoulou*, National Technical University of Athens
Louis H Kauffman, University of Illinois at Chicago
(96557176)

6:00 p.m.
Biologic, Tangles and DNA.
Louis H. Kauffman*, UIC
Sofia Lambropoulou, National Techinical University at Athens, Greece
(9655796)

Sunday April 22, 2001, 8:00 a.m.10:50 a.m.
Special Session on Physical Knotting and Unknotting, III
Room 215, Classroom Building Complex C, Classroom Building Complex C
Organizers:
Jorge Alberto Calvo, North Dakota State University jorge_calvo@ndsu.nodak.edu
Kenneth C. Millett, University of California Santa Barbara millett@math.ucsb.edu
Eric J. Rawdon, Chatham College rawdon@chatham.edu

8:00 a.m.
Untangling some spheres in $R^4$ by energy minimizing flow.
Dennis M Roseman*, University of Iowa
(96558200)

8:30 a.m.
The Second Hull of a Knotted Curve.
John M Sullivan*, Univ of Illinois
Jason Cantarella, Univ of Georgia
Rob Kusner, UMass/Amherst
Greg Kuperberg, UC Davis
(9655149)

9:00 a.m.
Energy of knots and the infinitesimal crossratio.
Jun O'Hara*, Dept. of Maht., Tokyo Metropolitan University
(96557137)

9:30 a.m.
Most knot energies are minimized by circles.
Aaron Abrams, University of Georgia
Jason Cantarella*, University of Georgia
Joe Fu, University of Georgia
Mohammad Ghomi, University of South Carolina
Ralph Howard, University of South Carolina
(96553181)

10:00 a.m.
On ropelength, thickness and conformal moduli of knots and links.
Robert B Kusner*, University of Massachusetts
(9655790)

10:30 a.m.
Characterizing Polygons with a Small Number of Edges in $ \mathbb{R}^3 $.
Jorge Alberto Calvo*, North Dakota State University
(96557140)

Sunday April 22, 2001, 3:00 p.m.5:20 p.m.
Special Session on Physical Knotting and Unknotting, IV
Room 215, Classroom Building Complex C, Classroom Building Complex C
Organizers:
Jorge Alberto Calvo, North Dakota State University jorge_calvo@ndsu.nodak.edu
Kenneth C. Millett, University of California Santa Barbara millett@math.ucsb.edu
Eric J. Rawdon, Chatham College rawdon@chatham.edu

3:00 p.m.
Calculating in the space of knots or links.
Richard Randell*, University of Iowa
(96557135)

3:30 p.m.
Investigations of Polygonal Knot Space and Ideal Physical Knot Configurations.
Kenneth C Millett*, University of California, Santa Barbara
(96557203)

4:00 p.m.
A spectrum for natural knotting?
Gregory R Buck*, Saint Anselm College
Robert G Scharein, University of British Columbia
(96582166)

4:30 p.m.
Hyperbolic reflections of polygonal knots.
Richard Randell, University of Iowa
Jonathan Simon*, University of Iowa
Joshua Tokle, University of Iowa
(96557186)

5:00 p.m.
Inscribing Smooth Knots in Polygonal Knots to Determine Minimal Ropelength.
Eric J Rawdon*, Chatham College
(96557159)
Inquiries: meet@ams.org