Vassalos Paraskevas

Vassalos Paraskevas is an Assistant Professor at the Department of Informatics, Athens University of Economics and Business. He holds a Degree in Mathematics from the University of Athens (1998), a Postgraduate Diploma in Computational Mathematics and Informatics, and a Doctorate in Computational Mathematics from the University of Ioannina (2003). His office is located at the Antoniadou Wing, 5th floor, and he can be reached at pvassal@aueb.gr or +30 210 8203 187.

• Education
  • BSc in Mathematics, University of Athens
  • MSc in Computational Mathematics and Informatics, University of Ioannina
  • PhD in Computational Mathematics, University of Ioannina (2003)

His research focuses on Numerical Linear Algebra, particularly on solving linear systems with structured matrices (e.g., Toeplitz and block Toeplitz systems), signal/image reconstruction, and numerical solutions of differential equations. He has developed preconditioning techniques for iterative solvers and studied stochastic matrices with Toeplitz-like structures.

His publications (2002-2008) analyze preconditioning strategies for Toeplitz systems, covering spectral analysis of matrices from PDE discretization, superlinear convergence in PCG methods, and approximation techniques for multilevel Toeplitz matrices. These works span Numerical Analysis, Applied Mathematics, and Computational Science, with applications in linear systems, differential equations, and matrix theory.