(Updated August 22, 2019)

Talks for a Professional Audience

• Plenary lecture, Intermountain Section of the MAA, Westminister College, Salt Lake City, UT, March 2020
  
• Plenary lecture, Seaway Section of the MAA, St. John Fisher College, April 2010
  
• Plenary lecture, Southeast Section of the MAA, Lee University, March 2019
• Willoughby Fellows Program, Dickinson College, August 2016
• Plenary lecture, Iowa section of the MAA, Graceland University, September 2015
• Plenary lecture, New Jersey section of the MAA, Monmouth University, April 2015
• Northwestern University mathematics colloquium, December 2013
• Featured lecture, Mathematics of Various Entertaining Subjects (MOVES) Conference, Museum of Mathematics, August 2013
• Philadelphia Area Seminar on the History of Mathematics, Villanova University, September 2012
• Topology/Geometry seminar, Rutgers University, April 2012
• Applied and Computational Math Seminar, George Mason University, January 2011
• Dynamical Systems Seminar, Penn State University, September 2010
• Various Aspects of Dynamical Systems, International Congress of Mathematicians Satellite Conference, M. S. University, Baroda, Vadodara, Gujarat, India, August 2010
• The keynote “Euler lecture” for the 2010 Euler Conference, Adelphi University, July 2010
• Tetrahedral Geometry/Topology Seminar, April 2010
• Millersville–Franklin & Marshall Colloquium, April 2009
• Tetrahedral Geometry/Topology Seminar, April 2008
• Brigham Young University, December 2007
• Plenary lecture at the EPaDel sectional meeting of the Mathematical Association of America, Delaware State University, April 2007
• Philadelphia Area Seminar on the History of Mathematics, Villanova University, March 2007
• Dynamical Systems Seminar, University of Maryland, March 2007
• The Frederick V. Pohle Colloquium on the History of Mathematics, Adelphi University, November 2005
• Joint meeting of the American Mathematical Society and the Real Sociedad Matematica Espanola, Seville, Spain, June 2003
• Dynamical Systems Seminar, University of Maryland, November 2001
• University of Cincinnati Mathematics department colloquium, March 1999
• University of Cincinnati Dynamical Systems seminar, March 1999
• Michigan State University Mathematics department colloquium, September 1998
• One hour invited plenary lecture at the University of Cincinnati for the conference “Smalefest: Global Analysis 30 Years Later,” March 1998
• Northwestern University, Dynamical Systems Seminar, November 5, 1997
• Northwestern University, Dynamical Systems Seminar, September 30, 1997
• Northwestern University, Dynamical Systems Seminar, June 5, 1997

Talks for a General Audience

• Two public Math Encounters lectures, National Museum of Mathematics, November 2019
  
• Villanova University, November 2019
  
• Keynote lecture, Shenandoah Undergraduate Mathematics and Statistics Conference, James Madison University, September 2019
  
• Plenary lecture at STEM CARIB 2019: The Future is Now, hosted by Harrisburg University and the University College Cayman Islands, October 2019
  
• Martin Guterman Lecture, Tufts University, March 2019
• MAA Distinguished Lecture series, Celebration of Mind event, MAA Carriage House, Washington, DC, October 2017
• Gettysburg College, October 2017
• Shippensburg University, September 2017
• MAA Chan Stanek Lecture for Students, MAA MathFest 2017, Chicago, August 2017
• Mount St. Mary’s College ACM/MAA student chapter lecture, November 2016
• Keynote address at the Dickinson College Math/CS major’s dinner, April 2016
• Muhlenberg College, September 2015
• Undergraduate Prize Lecture, Northwestern University, May 2014
• Focus on Math Colloquium, Brigham Young University, November 2012
• Juniata College, October 2012
• Randolph-Macon College, October 2012
• Keynote address at the Elizabethtown College Pi Mu Epsilon Banquet, April 2012
• Elizabethtown College mathematics colloquium, April 2012
• Shippensburg University mathematics colloquium, February 2012
• Lafayette College mathematics colloquium, December 2011
• Notre Dame University, Math for Everyone lecture series, November 2011
• Dickinson College Rush Hour science lecture series, September 2011
• Hood College’s Pi Mu Epsilon Lecture, April 2010
• Messiah College, April 2010
• Mount St. Mary’s Pi Mu Epsilon Lecture, March 2010
• Gettysburg College Mathematics Colloquium, November 2009
• Juniata College Mathematics Colloquium, November 2009
• Keynote address at the Millersville University Mathematics Honors Banquet, April 2009
• Hamilton College Mathematics Colloquium, April 2009
• Shippensburg Student Mathematics Conference, keynote speaker, March 2009
• Brigham Young University, December 2007
• Shippensburg University, November 2007
• Bucknell University, October 2007
• Keynote address at the Elizabethtown College Pi Mu Epsilon Banquet, April 2007
• Elizabethtown College mathematics colloquium, April 2007
• FaculTEA, Dickinson College, April 2007
• Keynote address at the Millersville University Mathematics Honors Banquet, April 2006
• Dickinson College Math/CS chat, November 2005
• Shippensburg University, November 2004
• Dickinson College Math/CS chat, November 2004
• Keynote speaker, Department of Mathematics and Computer Science Majors dinner, May 2004
• Hamilton College, February 2004
• Dickinson College Math/CS chat, November 2002
• Swarthmore College, September 2002
• Alumni College course at Dickinson College, June 2002
• Gettysburg College Math Department Colloquium, January 2002
• Dickinson College Math/CS chat, October 2001
• Dickinson College Math/CS chat, February 2000 
• Furman University Mathematics Colloquium, February 2000
• North Central College Mathematics Colloquium, February 2000
• Coe College Mathematics Colloquium, February 1998

Miscellaneous Presentations, Panel Discussions, Interviews, etc.

• Panelist on the panel “Leveraging Social Media for the Greater Good of Mathematics,” Joint Mathematics Meeting, Denver, January 2020
• Interview by Jim Stein, for the New Books Network podcast, interview scheduled for September 2019
• “Math You Can Make” breakout session at STEM CARIB 2019: The Future is Now, hosted by Harrisburg University and the University College Cayman Islands, October 2019
• “Sugihara’s Impossible Cylinder,” a family activity at the Museum of Mathematics MOVES conference, New York, August 2017
• Interviewed by Evelyn Lamb and Kevin Knudson for their podcast My Favorite Theorem, August 2017
• “What Editors Want: Top Tips from Journal Editors” panel, Dickinson College, September 2016
• “Inquiry-Based Learning,” organized and lead a table discussion at the New Jersey section meeting of the MAA, April 2015
• Panelist for “Writing for MAA Journals and Magazines,” MathFest 2014, Portland, OR, August 2014
• Panelist in a First-Year Seminar prep session, May 2014
• Interviewed by Sol Lederman on his Inspired by Math/Wild About Math! podcast, February 2013
• Presentation on my use of wikis, podcasts, online LaTeX software, etc. for the February 2013 Dickinson College Board of Trustees visit
• Panelist for “Men: In focus,” sponsored by Men Overcoming Restrictive Expectations (M.O.R.E.), Dickinson College, October 2012
• Willoughby Fellows alumni panel to discuss the use of technology in teaching, Willoughby Fellows Program, Dickinson College, August 2012
• Panelist for the “Dickinson’s distinctive approach to the natural sciences” discussion during a fall admissions open house, Dickinson College, September 2011
• Interview by Samuel Hansen on his Acme Science/Strongly Connected Components podcast, March 2010
• “Family Matters,” a panel about balancing family life and work, sponsored by the Association for Women in Mathematics, MathFest 2009, August 2009, Portland, OR
• On-air interview with Jerry Bowyer, Pittsburg Business Radio, AM1360 WMNY, April 2009
• Panelist for discussion of “The College’s Fraternity and Sorority Community in the Eyes of the College’s Faculty and Administration,” February 2004
• Panelist for discussion of “Intellectual community,” for new faculty orientation, Fall 2003
• Presenter for the “Sexual Assault Prevention” discussion for incoming first year students, orientation week, Fall 2001