| Date | Speaker(s) | Title |
| 13 Jan 2009 | Dmitry Scheglov, Penn State | Lusternik-Shnirelman Theorem on three closed geodescs on a sphere, I. |
| 20 Jan 2009 | Dmitry Scheglov, Penn State | Lusternik-Shnirelman Theorem on three closed geodescs on a sphere, II. |
| 27 Jan 2009 | Pavlo Tsytsura, Penn State | Exponential error term for the growth of closed geodesics on negatively curved surfaces; after Dolgopyat and Pollicott-Sharp, II. |
| 3 Feb 2009 | Pavlo Tsytsura, Penn State | Exponential error term for the growth of closed geodesics on negatively curved surfaces; after Dolgopyat and Pollicott-Sharp, III. |
| 10 Feb 2009 | Federico Rodriguez Hertz, IMERL, Montevideo | Introduction to dynamics and ergodic theory of partially hyperbolic systems, I. |
| 17 Feb 2009 | Federico Rodriguez Hertz, IMERL, Montevideo | Introduction to dynamics and ergodic theory of partially hyperbolic systems, II. |
| 24 Feb 2009 | Federico Rodriguez Hertz, IMERL, Montevideo | Introduction to dynamics and ergodic theory of partially hyperbolic systems, III. |
| 3 Mar 2009 | Anatole Katok, Penn State | Slow entropies, I: A slow introduction |
| 10 Mar 2009 | | No seminar, Spring break |
| 17 Mar 2009 | Alain Albouy, Paris Observatory | Unexpected regularities in Newtonian n-body dynamics, I, |
| 24 Mar 2009 | Alain Albouy, Paris Observatory | Unexpected regularities in Newtonian n-body dynamics, II, |
| 31 Mar 2009 | Anatole Katok and Jean Paul Thouvenot, Penn State and Paris VI | Slow entropies, II: (Mostly) open problems |
| 7 Apr 2009 | | NO SEMINAR, MARYLAND CONFERENCE |
| 14 Apr 2009 | Andrey Gogolev, Penn State | Hyperbolic dynamics on exotic manifolds and topology of Anosov world, I. |
16 Apr 2009 MB113 3:30pm - 7:00pm | Andrey Gogolev, Penn State | Hyperbolic dynamics on exotic manifolds and topology of Anosov world, II. |
| 21 Apr 2009 | Livio Flaminio, University of Lille | Cohomological equations and renormalization, I. |
| 28 Apr 2009 | Livio Flaminio, University of Lille | Cohomological equations and renormalization, II |
| 1 Sep 2009 | Anatole Katok, Penn State | Some new problems in elliptic and parabolic dynamics |
| 8 Sep 2009 | Boris Kalinin, University of South Alabama, visiting Penn State | Livshits - type theorems and applications, I. |
| 15 Sep 2009 | Boris Kalinin, University of South Alabama, visiting Penn State | Livshits - type theorems and applications, II. |
| 22 Sep 2009 | Boris Kalinin, University of South Alabama, visiting Penn State | Livshits - type theorems and applications, III. |
| 29 Sep 2009 | Lewis Bowen, Texas A & M University | Entropy in measurable dynamics, I |
| 6 Oct 2009 | Lewis Bowen, Texas A & M University | Entropy in measurable dynamics, II |
| 13 Oct 2009 | Lewis Bowen, Texas A & M University | Entropy in measurable dynamics, III |
| 20 Oct 2009 | Jean-Francois Quint, University of Paris-13 | Measure rigidity for Zariski dense groups, I. |
| 27 Oct 2009 | Jean-Francois Quint, University of Paris-13 | Measure rigidity for Zariski dense groups, II. |
| 3 Nov 2009 | Jean-Francois Quint, University of Paris-13 | Measure rigidity for Zariski dense groups, III. |
| 10 Nov 2009 | Jean-Francois Quint, University of Paris-13 | Measure rigidity for Zariski dense groups, IV. |
| 17 Nov 2009 | Vadim Kaloshin, Penn State | Survey of Arnold diffusion |
| 24 Nov 2009 | | NO SEMINAR, Thanksgiving holiday |
| 1 Dec 2009 | Svetlana Katok, Penn State | Attractors, coding and reduction theory for new general classes of continued fractions, I. |
| 8 Dec 2009 | Svetlana Katok, Penn State | Attractors, coding and reduction theory for new general classes of continued fractions, II. |