लेखक: Andrea Bonfiglioli

1) ERMANNO LANCONELLI: –Education and Undergraduate Studies: Dec. 1966, Universita” di Bologna (Mathematics). Career/Employment: 1975-present: Full Professor of Mathematical Analysis at Dipartimento di Matematica, Universita” di Bologna (Italy); Member of the “Accademia dell”Istituto di Bologna” and of the “Accademia delle Scienze, Lettere ed Arti di Modena”. 1968-1975: Theaching Assistant at Istituto di Matematica, Universita” di Bologna. –Academic activity: Director of the Istituto di Matematica di Bologna(1978/80), Director of the Undergraduate Mathematics Program, University of Bologna (1990/1999, 2000-2002, 2006-present) Director of PHD program, University of Bologna (1986/91, 1997/2000) –INVITATIONS: -University of Minnesota, Minneapolis (USA) -University of Purdue, West La Fayette, Indiana (USA) -Temple University, Philadelphia, Pennsylvania (USA) -Rutgers University, New Brunswick, New Jersey (USA) -University of Bern, Switzerland — Specialization main fields: Partial Differential Equations, Potential Theory –CURRENT RESEARCH INTEREST: Second order linear and nonlinear partial differential equations with non- negative characteristic form and application to complex geometry and diffusion processes. Potential Theory and Harmonic Analysis in sub-riemannian settings. Real analysis and geometric methods. –EDITORIAL BOARD: Nonlinear Differential Equations and Applications, Birkhauser. –PUBLICATIONS: More than 70 papers in refereed journals. 2) UGUZZONI FRANCESCO: –Education and Undergraduate Studies: Dec. 1994, Universita” di Bologna (Mathematics) Career/Employment: February 2000: Ph.D. in Mathematical Analysis at Dipartimento di Matematica, Universita” di Bologna (Italy). October 1998: Assistant Professor at Dipartimento di Matematica, Universita” di Bologna. –CURRENT RESEARCH INTEREST: Second order linear and nonlinear partial differential equations with non- negative characteristic form and applications. Harmonic Analysis in sub- riemannian settings. –PUBLICATIONS: About 30 papers in refereed journals. 3) ANDREA BONFIGLIOLI: –Education and Undergraduate Studies: July 1998, Universita” di Bologna (Mathematics) –Career/Employment: March 2002: Ph.D. in Mathematical Analysis at Dipartimento di Matematica, Universita” di Bologna (Italy). November 2006: Assistant Professor at Dipartimento di Matematica, Universita” di Bologna. –CURRENT RESEARCH INTEREST: Second order linear partial differential equations with non-negative characteristic form and applications. Potential Theory in stratified Lie groups. –PUBLICATIONS: About 20 papers in refereed journals.