PhD:University of Paris-Sud, February 1994; PhD advisor:
MS: University of Bucharest, 1990.
BA: College Carol I, Craiova, 1985.
1994-present: Researcher, Institute Fourier, Grenoble.
1999-2000: Visiting Associate Professor, Tokyo Institute of Technology.
1993-1994: Instructor (ATER), University Paris-Sud.
1990-1994: Junior Researcher, Institute of Mathematics of the Romanian
Profinite completions of Burnside-type surface groups (with Pierre Lochak), Commun. Math. Phys. 360(2018), 1061-1082.
Diffeomorphisms groups of tame Cantor sets
and Thompson-like groups (with Yury Neretin),
Compositio Math. 154 (2018), 1066-1110.
Centrally extended mapping class groups from
quantum Teichmuller theory (with Rinat Kashaev) Advances Math. 252 (2014), 260-291.
Torus bundles not distinguished by TQFT invariants,
with an Appendix joint with Andrei Rapinchuk,
Geom. Topol. 17(2013), 2289-2344.
The first Johnson subgroups act ergodically on
SU(2) character varieties (with Julien Marche) J. Diff. Geometry 95(2013), 407-418.
Zariski density and finite quotients of mapping class groups, International Mathematics Research Notices 2013, no.9, 2078-2096.
Global classification of isolated
singularities in dimensions (4,3) and (8,5),
Ann. Scuola Norm. Sup. Pisa Cl. Sci., vol X (2011), 819-861.
Central extensions of the Ptolemy-Thompson group and quantized Teichmuller theory (with Vlad Sergiescu) J.Topology 3(2010), 29-62.
An infinite genus mapping class group and stable cohomology (with Christophe Kapoudjian)
Commun. Math.Phys. 287(2009), 787-804.
PhD former and present Students:
Paolo Bellingeri (co-directed by Vlad Sergiescu):
Braids on surfaces and link invariants, 2003.
Daniele Otera (co-directed by Valentin Poenaru):
Asymptotic invariants of discrete groups, 2006.
Maxime Wolff : On the exotic components of the space of
surface groups actions on the hyperbolic plane, 2007.
Frederic Palesi: Dynamics on representations spaces for
non-orientable surfaces, 2009.
Ariadna Fossas (co-directed by Jose Burillo): Geometric and combinatorial aspects of Thompson's group T, 2012.
Maxime Nguyen: Mapping class groups and automorphisms of complexes of surfaces of
infinite type, 2012.
Souza (co-directed by Denise de Mattos):
(H,G)-coincidence theorems for manifolds and global classification of isolated singularities in dimensions (6,3), Univ Sao Carlos, Brazil, 2013.
Julien Korinman: On quantum representations of mapping class groups, 2014.
Binbin Xu (co-directed by Greg McShane) : Hyperbolic Pleijel identities and quantum Teichmuller spaces, 2014.
Pablo Gonzalez Pagotto: On the cosets monoid of the infinite braid group, 2019.
Clement Berat: Surface groups representations into solvable groups.