Presentations

"On the failure of the first Cech homotopy group to register geometrically relevant fundamental group elements", Spring Topology and Dynamics Conference, Murray State University, May 15, 2021. 

"On the failure of the first Cech homotopy group to register geometrically relevant fundamental group elements", Arches Topology Conference, Hurricane, Utah, April 25, 2019. 

"The Fundamental Group of the Menger Sponge and the Towers of Hanoi", Colloquium Talk, West Chester University of Pennsylvania, November 2, 2018. 

"Cotorsion-free groups and related local properties of fundamental groups", Arches Topology Conference, Moab, Utah, May 10, 2018. 

"Test maps for local properties of π1", Topology Seminar, University of Wisconsin-Milwaukee, November 17, 2017.

"The Fundamental Group of the Menger Sponge and the Towers of Hanoi", Colloquium Talk, University of Wisconsin-Milwaukee, November 17, 2017.

"A characterization of cotorsion-free groups in terms of homomorphisms from fundamental groups of Peano continua", Joint Meeting of the Austrian Mathematical Society (ÖMG) and the German Mathematical Society (DMV), Paris-Lodron-University Salzburg, Austria, September 12, 2017.

"Word calculus in the fundamental group of the Menger cube", A Celebration of Mathematics at UW-Milwaukee, October 22, 2016.

"Cotorsion-free groups from a topological viewpoint", Topology Symposium (TOPOSYM), Prague, Czech Republic, July 26, 2016.

"Word calculus in the fundamental group of the Menger sponge", Colloquium Talk, Georgia State University, September 25, 2015.

"Cotorsion-free groups from a topological viewpoint", Spring Topology and Dynamics Conference, Bowling Green State University, May 15, 2015.

"Word calculus in the fundamental group of the Menger curve", Joint Meeting of the German Mathematical Society (DMV) and the Polish Mathematical Society (PTM), Adam Mickiewicz University, Poznan, Poland, September 18, 2014.

"Cotorsion-free groups from a topological viewpoint", Topology Seminar, Waseda University, Tokyo, Japan, June 4, 2014.

"A core-free semicovering of the Hawaiian Earring", Spring Topology and Dynamics Conference, University of Richmond, March 12, 2014.

"Word calculus in the fundamental group of the Menger curve", International Conference on Topology and Geometry 2013 & 6th Japan-Mexico Topology Symposium, Shimane University, Japan, September 5, 2013.

"A core-free semicovering of the Hawaiian Earring", Topology Seminar, Waseda University, Tokyo, Japan, June 17, 2013.

"Word calculus in the fundamental group of the Menger curve", Spring Topology and Dynamics Conference, Central Connecticut State University, March 24, 2013.

"Word calculus in the fundamental group of the Menger curve", Topology Meeting, Waseda University, Tokyo, Japan, June 13, 2012.

"Generalized Cayley graphs for fundamental groups of one-dimensional spaces", Workshop on Topology of Wild Spaces and Fractals, Strobl, Austria, July 5, 2011.

"Generalized Cayley graphs for fundamental groups of one-dimensional spaces", Dubrovnik VII - Geometric Topology, Dubrovnik, Croatia, July 1, 2011.

"Generalized Cayley graphs for fundamental groups of one-dimensional spaces", Colloquium Talk, Brigham Young University, March 8, 2011.

"Combinatorial R-trees as generalized Cayley graphs for fundamental groups of one-dimensional spaces", Geometric Topology Meeting, Kobe University, Japan, May 21, 2010.

"Combinatorial R-trees as generalized Cayley graphs for fundamental groups of one-dimensional spaces", Spring Topology and Dynamical Systems Conference, Mississippi State University, March 19, 2010. 

"On the geometric structure of generalized universal covering spaces", Colloquium Talk, Mathematics Institute of the University of Gdansk, Poland, July 1, 2009.

"Trees of manifolds", Logic Seminar, Waseda University, Japan, June 12, 2009.

"Arc-smooth generalized universal covering spaces", Spring Topology and Dynamical Systems Conference, Milwaukee, Wisconsin, March 15, 2008.

"On the geometry of wild planar sets", Colloquium Talk, Shizuoka University, Japan, July 23, 2007.

"Generalized universal covering spaces as a tool for asphericity proofs", Colloquium Talk, Kyoto University, Japan, November 21, 2006.

"Pulling back continuously varying shortest paths through maps to 1-dimensional spaces", Colloquium Talk, Shizuoka University, Japan, November 9, 2006.

"Generalized universal covering spaces", Conference on General Topology, Geometric Topology and Their Applications, Research Institute for Mathematical Sciences, Kyoto University, Japan, October 18, 2006.

"
Generalized universal covering spaces", Low Dimensional Topology Seminar, Osaka University, Japan, October 10, 2006.

"Non-semilocally simply connected spaces with `universal covering spaces' ",  International Conference on Geometric Topology honoring Karol Borsuk's life and work on the 100th anniversary of his birth, Bedlewo, Poland, July 8, 2005.

"On non-semilocally simply connected spaces whose fundamental groups inject into their shape groups", Topology Seminar, Osaka University, Japan,  June 14, 2005.

"Generalized universal covering spaces and the shape group", Third Japan-Mexico Joint Meeting on Topology and Its Applications, Oaxaca, Mexico, December 7, 2004.


"Generalized universal covering spaces and the shape group",
21th Annual Workshop in Geometric Topology, University of Wisconsin-Milwaukee, June 12, 2004.

"Unique path lifting and the shape group", Spring Topology and Dynamical Systems Conference, Birmingham, Alabama, March 25, 2004.

"Relationships between different notions of fundamental group and some consequences", Colloquium Talk, University of Wisconsin-Milwaukee, November 14, 2003.

"The fundamental groups of subsets of closed surfaces inject into their first shape groups", 20th Annual Workshop in Geometric Topology, Park City, Utah, June 13, 2003.

"Some geometric aspects of the fundamental group at infinity", Colloquium Talk, Mississippi State University, April 4, 2003.

"The fundamental groups of subsets of closed surfaces inject into their first shape groups", Spring Topology and Dynamical Systems Conference, Lubbock, Texas, March 20, 2003.

"Some geometric aspects of the fundamental group at infinity", Colloquium Talk, Mathematics Institute of the University of Gdansk, Poland, July 11, 2002.

"On homotopy properties of certain Coxeter group boundaries", 19th Annual Workshop in Geometric Topology, Calvin College, Grand Rapids, Michigan, June 14, 2002.

"On homotopy properties of CAT(0) boundaries", Spring Topology and Dynamical Systems Conference, Austin, Texas, March 21, 2002. 

"Some geometric aspects of the fundamental group at infinity", Svalbard Geometric Topology Conference, Svalbard, Norway, August 12, 2001. 

"Coxeter group boundaries and closed aspherical manifolds", Nordic Conference on Topology and Applications, Nordfjordeid, Norway, August 9, 2001.

"Fundamental groups of certain visual boundaries", 18th Annual Workshop in Geometric Topology at Oregon State Universtiy, June 21, 2001. 

"The fundamental group of a visual boundary versus the fundamental group at infinity", AMS New Orleans meeting, January 10, 2001.

"Group theoretic conditions under which closed aspherical manifolds are covered by Euclidean space", Spring Topology Conference, University of Texas at San Antonio, March 18, 2000.

"Group theoretic conditions under which closed aspherical manifolds are covered by Euclidean space",  AMS Washington D.C. meeting, January 19, 2000.

"Boundaries of right angled Coxeter groups with manifold nerves", AMS Gainesville meeting, March 13, 1999.

"Boundaries of right angled Coxeter groups with manifold nerves", Wasatch Topology Conference, University of Utah, November 21, 1998.

"Homogeneity of visual boundaries of some non-positively curved manifolds", AMS Baltimore meeting, January 10, 1998.

"Homogeneity of boundaries of right angled Coxeter groups having manifold nerves", AMS Milwaukee meeting, October 24, 1997.

"Homogeneity of boundaries of right angled Coxeter groups having manifold nerves",  14th Annual Workshop in Geometric Topology, Oregon State University, June 5, 1997.