Vassalos Paraskevas
Assistant Professor
Bachelor in Mathematics, University of Athens
Master and Doctor of Science in Computational Mathematics and Informatics, University of Ioannina
Office:
Main Building, Antoniadou Wing, 5th floor
Email:
pvassal AT aueb gr
Telephone:
+ 30 210-8203-453
WebPage:
-
Office Hours:
Research Interests:
- Numeric solving linear systems with structured table rates
- Signal-image reconstruction
- Stochastic tables almost in Toeplitz form
- Numerical solution of ordinary partial differential equations
Dissertations:
Doctoral Dissertation: "Toeplitz systems Numerical solution", University of Ioannina, 2003.
Master Thesis: "Toeplitz systems numerical solution", University of Ioannina, 1998.
Selected Publications:
- D. Noutsos, S. Serra Capizzano and P. Vassalos, "Spectral analysis of the matrix coming from the discretization of semi-elliptic Differential Equations", Linear Algebra Appl. Vol 428(2008), pp. 600-624.
- D. Noutsos and P. Vassalos, "Superlinear Convergence for PCG using algebras plus band Toeplitz preconditioners", Computers and Mathematics with Applications, Vol 56 (2008), pp. 1255-1270}.
- D. Noutsos, S. Serra Capizzano and P. Vassalos "Block Band Toeplitz preconditioners derived from generating function approximation", Numerische Mathematik, Vol 104 (2006), pp. 339-376 .
- D. Noutsos, S. Serra Capizzano and P. Vassalos, "Two level Toeplitz preconditioning: Approximation results for matrices and functions", SIAM J. Sci. Comput., Vol 28 (2006), pp. 439-458.
- D. Noutsos, S. Serra Capizzano and P. Vassalos, "Preconditioning techniques for ill-conditioned symmetric Block Toeplitz systems", Numerical Linear Algebra and its Applications, Vol. 12 (2005), pp.231-239.
- D. Noutsos, S. Serra Capizzano and P. Vassalos, "Matrix algebra preconditioners for multilevel Toeplitz systems do not get Superlinear convergence", Theoretical Computer Science, Vol. 315 (2004), pp. 557-579.
- D. Noutsos and P. Vassalos, "New Band Toeplitz Preconditioners for ill-conditioned symmetric positive definite systems", SIAM J. Matrix Anal. Appl. Vol. 23(2002), pp 728-743.