My research deals with geometric structures on 3-manifolds. I have studied collapses of three manifolds, varieties of representations, deformations of structures, and Reidemeister torsions.

My research is partially supported by grant PID2021-125625NB-100

Address: Departament de Matemàtiques. Universitat Autònoma de Barcelona. 08193 Bellaterra. SPAIN
Office: C3b/152. Phone: (+34) 935868571. Fax (+34) 935812790
joan dot porti at uab dot cat

This is a picture of the generalized Dehn filling coefficients map (p,q) on the varietiy of SL(2,C) representations around an orbifold with Nil geometry: half of a a nice Whitney pleat (or cusp). The image of this maps describes the geometric structure corresponding to the coefficients, that in particular are not locally rigid for the spherical case. Can find more about this in an old paper: Regenerating hyperbolic cone structures from Nil.