Research Interest(s)

Geometric Group theory, Combinatorial algebra, Algorithmic problems in algebra.

American Mathematical Society Fellow (2012)

ICM Speaker (2006)

Lady Davis Fellowship (2003)

MSRI Awards MSRI Simons Research Professorship (Fall 2007)

• Gili Golan  defended her PhD in 2015 (co-advisor with Boaz Tsaban). Thesis: "Coloring Cayleygraphs of semigroups".
• Sam Corson defended his PhD in 2016. Thesis: "Subgroups and Quotients
  of Fundamental Groups".
• Curt Kent defended his PhD in March, 2013.. Thesis: "Topological properties of asymptotic cones of finitely generated groups".
• Iva Špakulová (Kozáková) defended her PhD in December, 2008.Thesis: "Percolation and Ising model on tree-like graphs".
• I was also a PhD advisor (together with John Meakin) of Tatyana Jajcayova. Thesis: "HNN extensions of inverse semigroups".