
Tsviatko Rangelov
Professor, DSc, Mathematical Physics Department, Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Acad.G.Bonchev str. 8, 1113 Sofia, Bulgaria Phone: +359.2.9792845, Fax: +359.2.9713649 Email: rangelov@math.bas.bg
MSc (1973), PhD (1976) Faculty of Mechanics and Mathematics, Moscow State University; DSc (2003) Institute of Mathematics and Informatics.

Fields of Interests: 
 Solvability and hypoellipticity for pseudodifferential operators with multiply characteristics.  Scattering theory for hyperbolic equations and systems for moving obstacles.  Nonlinear degenerate parabolic equations.  Boundary value problems for elasticity system in the domains with cracks, numerical solutions using Boundary Integral Equation Method.
