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Constantin Popa
Titlu
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Kaczmarz extended algorithm for tomographic image reconstruction from limited-data
C Popa, R Zdunek
Mathematics and Computers in Simulation 65 (6), 579-598, 2004
1202004
Extensions of block-projections methods with relaxation parameters to inconsistent and rank-deficient least-squares problems
C Popa
BIT Numerical Mathematics 38, 151-176, 1998
891998
Least-squares solution of overdetermined inconsistent linear systems using Kaczmarz's relaxation
C Popa
International journal of computer mathematics 55 (1-2), 79-89, 1995
671995
Projection algorithms-classical results and developments: Applications to image reconstruction
C Popa
LAP, Lambert Academic Pub., 2012
432012
Single projection Kaczmarz extended algorithms
S Petra, C Popa
Numerical Algorithms 73, 791-806, 2016
412016
Convergence rates for Kaczmarz-type algorithms
C Popa
Numerical Algorithms 79 (1), 1-17, 2018
322018
On Kaczmarz’s projection iteration as a direct solver for linear least squares problems
C Popa, T Preclik, H Köstler, U Rüde
Linear Algebra and Its Applications 436 (2), 389-404, 2012
292012
Characterization of the solutions set of inconsistent least-squares problems by an extended Kaczmarz algorithm
C Popa
Korean Journal of Computational and Applied Mathematics 6, 51-64, 1999
291999
Constrained Kaczmarz extended algorithm for image reconstruction
C Popa
Linear Algebra and its Applications 429 (8-9), 2247-2267, 2008
202008
A method for improving orthogonality of rows and columns of matrices
C Popa
International journal of computer mathematics 77 (3), 469-480, 2001
182001
A hybrid Kaczmarz–Conjugate Gradient algorithm for image reconstruction
C Popa
Mathematics and Computers in Simulation 80 (12), 2272-2285, 2010
162010
Block-projections algorithms with blocks containing mutually orthogonal rows and columns
C Popa
BIT Numerical Mathematics 39, 323-338, 1999
161999
Penalized least-squares image reconstruction for borehole tomography
C Popa, R Zdunek
Proceedings of ALGORITMY 2005 Conference, Vysoke Tatry–Podbanske, Slovakia …, 2005
152005
Extended and constrained Cimmino-type algorithms with applications in tomographic image reconstruction
S Petra, C Popa, C Schnörr
142008
Extension of an approximate orthogonalization algorithm to arbitrary rectangular matrices
C Popa
Linear algebra and its applications 331 (1-3), 181-192, 2001
142001
Interpolation and related coarsening techniques for the algebraic multigrid method
G Golubovici, C Popa
Multigrid Methods IV: Proceedings of the Fourth European Multigrid …, 1994
141994
Extended and constrained diagonal weighting algorithm with application to inverse problems in image reconstruction
C Popa
Inverse Problems 26 (6), 065004, 2010
132010
Preconditioning conjugate gradient method for nonsymmetric systems
C Popa
International journal of computer mathematics 58 (1-2), 117-133, 1995
131995
Nonlinear multigrid methods for numerical solution of the variably saturated flow equation in two space dimensions
G Juncu, A Nicola, C Popa
Transport in porous media 91, 35-47, 2012
122012
Algebraic multigrid smoothing property of kaczmarz’s relaxation for general rectangular linear systems£
C Popa
Electronic Transactions on Numerical Analysis 29, 150-162, 2008
122008
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