**Address:** 361 Olin

Department of Mathematics

Bucknell University

Lewisburg, PA 17837

**Email:** van.cyr@bucknell.edu

I am an Assistant Professor in the Department of Mathematics at Bucknell University. I work in dynamical systems and am currently interested in thermodynamic formalism as well as problems related to multidimensional symbolic dynamics. My CV is available here.

This Spring I am teaching Math 211 (Calculus III) and Math 308 (Real Analysis I). Course information and assignments will be posted on Moodle.

**Spectral Gap and Transience for Ruelle Operators on Countable Markov Shifts**with Omri Sarig. Commun. Math. Phys. 292, 637-666 (2009).**Countable Markov Shifts with Transient Potentials**Proc. London Math. Soc. 103(6), 923-949 (2011).**A Number Theoretic Question Arising in the Geometry of Plane Curves and Billiard Dynamics**Proc. Amer. Math. Soc. 140, 3035-3040 (2012).**Nonexpansive Z^2-subdynamics and Nivat's conjecture**with Bryna Kra, To appear in Trans. Amer. Math. Soc.**Harmonic Labeling of Graphs**with Itai Benjamini, Eviatar Procaccia, and Ran Tessler. Discr. Math. 313, 1726-1745 (2013).**Complexity of short rectangles and periodicity**with Bryna Kra, submitted (2013).**The automorphism group of a shift of subquadratic growth**with Bryna Kra, submitted (2014).