Gregorio Quintana-Ortí

Publication Activity (10 Years)

Years Active: 1998-2023
Publications (10 Years): 14

Top Topics

Parallel Implementation

Randomized Algorithm

Top Venues

ACM Trans. Math. Softw.

Concurr. Comput. Pract. Exp.

Comput. Methods Programs Biomed.

Publications

Gregorio Quintana-Ortí, Fernando Hernando, Francisco D. Igual
Algorithm 1033: Parallel Implementations for Computing the Minimum Distance of a Random Linear Code on Distributed-memory Architectures. ACM Trans. Math. Softw. 49 (1) (2023)
Nathan Heavner, Per-Gunnar Martinsson, Gregorio Quintana-Ortí
Computing rank-revealing factorizations of matrices stored out-of-core. Concurr. Comput. Pract. Exp. 35 (22) (2023)
Gregorio Quintana-Ortí, Mónica Chillarón, Vicente Vidal, Gumersindo Verdú
High-performance reconstruction of CT medical images by using out-of-core methods in GPU. Comput. Methods Programs Biomed. 218 (2022)
Nathan Heavner, Francisco D. Igual, Gregorio Quintana-Ortí, Per-Gunnar Martinsson
Algorithm 1022: Efficient Algorithms for Computing a Rank-Revealing UTV Factorization on Parallel Computing Architectures. ACM Trans. Math. Softw. 48 (2) (2022)
Mercedes Marqués Andrés, José Manuel Badía-Contelles, Gregorio Quintana-Ortí
Students' Perception of the Effect of Formative Assessment on Their Learning. Rev. Iberoam. de Tecnol. del Aprendiz. 16 (3) (2021)
Nathan Heavner, Francisco D. Igual, Gregorio Quintana-Ortí, Per-Gunnar Martinsson
Efficient algorithms for computing a rank-revealing UTV factorization on parallel computing architectures. CoRR (2021)
Mónica Chillarón, Gregorio Quintana-Ortí, Vicente Vidal, Gumersindo Verdú
Computed tomography medical image reconstruction on affordable equipment by using Out-Of-Core techniques. Comput. Methods Programs Biomed. 193 (2020)
Nathan Heavner, Per-Gunnar Martinsson, Gregorio Quintana-Ortí
Computing rank-revealing factorizations of matrices stored out-of-core. CoRR (2020)
Per-Gunnar Martinsson, Gregorio Quintana-Ortí, Nathan Heavner
randUTV: A Blocked Randomized Algorithm for Computing a Rank-Revealing UTV Factorization. ACM Trans. Math. Softw. 45 (1) (2019)
Mónica Chillarón, Gregorio Quintana-Ortí, Vicente Vidal, Gumersindo Verdú
Computed tomography medical image reconstruction on affordable equipment by using out-of-core techniques. CoRR (2019)
Fernando Hernando, Francisco D. Igual, Gregorio Quintana-Ortí
Algorithm 994: Fast Implementations of the Brouwer-Zimmermann Algorithm for the Computation of the Minimum Distance of a Random Linear Code. ACM Trans. Math. Softw. 45 (2) (2019)
Gregorio Quintana-Ortí, Fernando Hernando, Francisco D. Igual
Parallel Implementations for Computing the Minimum Distance of a Random Linear Code on Multicomputers. CoRR (2019)
Per-Gunnar Martinsson, Gregorio Quintana-Ortí, Nathan Heavner, Robert A. van de Geijn
Householder QR Factorization With Randomization for Column Pivoting (HQRRP). SIAM J. Sci. Comput. 39 (2) (2017)
Fernando Hernando, Francisco D. Igual, Gregorio Quintana-Ortí
Fast Algorithms for the Computation of the Minimum Distance of a Random Linear Code. CoRR (2016)
Per-Gunnar Martinsson, Gregorio Quintana-Ortí, Nathan Heavner, Robert A. van de Geijn
Householder QR Factorization: Adding Randomization for Column Pivoting. FLAME Working Note #78. CoRR (2015)
Edoardo Di Napoli, Diego Fabregat-Traver, Gregorio Quintana-Ortí, Paolo Bientinesi
Towards an efficient use of the BLAS library for multilinear tensor contractions. Appl. Math. Comput. 235 (2014)
Field G. Van Zee, Robert A. van de Geijn, Gregorio Quintana-Ortí
Restructuring the Tridiagonal and Bidiagonal QR Algorithms for Performance. ACM Trans. Math. Softw. 40 (3) (2014)
Francisco D. Igual, Gregorio Quintana-Ortí, Robert A. van de Geijn
Scheduling algorithms-by-blocks on small clusters. Concurr. Comput. Pract. Exp. 25 (3) (2013)
Edoardo Di Napoli, Diego Fabregat-Traver, Gregorio Quintana-Ortí, Paolo Bientinesi
Towards an Efficient Use of the BLAS Library for Multilinear Tensor Contractions. CoRR (2013)
Francisco D. Igual, Ernie Chan, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Robert A. van de Geijn, Field G. Van Zee
The FLAME approach: From dense linear algebra algorithms to high-performance multi-accelerator implementations. J. Parallel Distributed Comput. 72 (9) (2012)
Gregorio Quintana-Ortí, Francisco D. Igual, Mercedes Marqués, Enrique S. Quintana-Ortí, Robert A. van de Geijn
A Runtime System for Programming Out-of-Core Matrix Algorithms-by-Tiles on Multithreaded Architectures. ACM Trans. Math. Softw. 38 (4) (2012)
Field G. Van Zee, Robert A. van de Geijn, Gregorio Quintana-Ortí, G. Joseph Elizondo
Families of Algorithms for Reducing a Matrix to Condensed Form. ACM Trans. Math. Softw. 39 (1) (2012)
Mercedes Marqués, Gregorio Quintana-Ortí, Enrique S. Quintana-Ortí, Robert A. van de Geijn
Using desktop computers to solve large-scale dense linear algebra problems. J. Supercomput. 58 (2) (2011)
Mercedes Marqués, Gregorio Quintana-Ortí, Enrique S. Quintana-Ortí, Robert A. van de Geijn
Out-of-Core Computation of the QR Factorization on Multi-core Processors. Euro-Par (2009)
Gregorio Quintana-Ortí, Enrique S. Quintana-Ortí, Robert A. van de Geijn, Field G. Van Zee, Ernie Chan
Programming matrix algorithms-by-blocks for thread-level parallelism. ACM Trans. Math. Softw. 36 (3) (2009)
Sergio Barrachina, Maribel Castillo, Francisco D. Igual, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Exploiting the capabilities of modern GPUs for dense matrix computations. Concurr. Comput. Pract. Exp. 21 (18) (2009)
José Ignacio Aliaga, Francisco Almeida, José M. Badía, Sergio Barrachina, Vicente Blanco Pérez, María Isabel Castillo, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Alfredo Remón, Casiano Rodríguez, Francisco de Sande, Adrián Santos
Toward the parallelization of GSL. J. Supercomput. 48 (1) (2009)
Mercedes Marqués, Gregorio Quintana-Ortí, Enrique S. Quintana-Ortí, Robert A. van de Geijn
Solving "large" dense matrix problems on multi-core processors. IPDPS (2009)
Rosa M. Badia, José R. Herrero, Jesús Labarta, Josep M. Pérez, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Parallelizing dense and banded linear algebra libraries using SMPSs. Concurr. Comput. Pract. Exp. 21 (18) (2009)
Maribel Castillo, Francisco D. Igual, Mercedes Marqués, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Rafael Rubio, Robert A. van de Geijn
Out-of-core solution of linear systems on graphics processors. Int. J. Parallel Emergent Distributed Syst. 24 (6) (2009)
Mercedes Marqués, Gregorio Quintana-Ortí, Enrique S. Quintana-Ortí, Robert A. van de Geijn
Using Graphics Processors to Accelerate the Solution of Out-of-Core Linear Systems. ISPDC (2009)
Gregorio Quintana-Ortí, Francisco D. Igual, Enrique S. Quintana-Ortí, Robert A. van de Geijn
Solving dense linear systems on platforms with multiple hardware accelerators. PPOPP (2009)
Field G. Van Zee, Ernie Chan, Robert A. van de Geijn, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
The libflame Library for Dense Matrix Computations. Comput. Sci. Eng. 11 (6) (2009)
Gregorio Quintana-Ortí, Enrique S. Quintana-Ortí, Alfredo Remón, Robert A. van de Geijn
An Algorithm-by-Blocks for SuperMatrix Band Cholesky Factorization. VECPAR (2008)
Ernie Chan, Field G. Van Zee, Paolo Bientinesi, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Robert A. van de Geijn
SuperMatrix: a multithreaded runtime scheduling system for algorithms-by-blocks. PPOPP (2008)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Solving linear-quadratic optimal control problems on parallel computers. Optim. Methods Softw. 23 (6) (2008)
Gregorio Quintana-Ortí, Enrique S. Quintana-Ortí, Ernie Chan, Robert A. van de Geijn, Field G. Van Zee
Design of scalable dense linear algebra libraries for multithreaded architectures: the LU factorization. IPDPS (2008)
Gregorio Quintana-Ortí, Enrique S. Quintana-Ortí, Ernie Chan, Robert A. van de Geijn, Field G. Van Zee
Scheduling of QR Factorization Algorithms on SMP and Multi-Core Architectures. PDP (2008)
Alfredo Remón, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Parallel Solution of Band Linear Systems in Model Reduction. PPAM (2007)
Bryan Marker, Field G. Van Zee, Kazushige Goto, Gregorio Quintana-Ortí, Robert A. van de Geijn
Toward Scalable Matrix Multiply on Multithreaded Architectures. Euro-Par (2007)
Ernie Chan, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Robert A. van de Geijn
Supermatrix out-of-order scheduling of matrix operations for SMP and multi-core architectures. SPAA (2007)
Ernie Chan, Field G. Van Zee, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Robert A. van de Geijn
Satisfying your dependencies with SuperMatrix. CLUSTER (2007)
José M. Badía, Peter Benner, Maribel Castillo, Heike Faßbender, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Strategies for Parallelizing the Solution of Rational Matrix Equations. PARCO (2007)
José M. Badía, Peter Benner, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Alfredo Remón
Parallel Implementation of LQG Balanced Truncation for Large-Scale Systems. LSSC (2007)
Peter Benner, Maribel Castillo, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Stabilizing large-scale generalized systems on parallel computers using multithreading and message-passing. Concurr. Comput. Pract. Exp. 19 (4) (2007)
Alfredo Remón, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
The Implementation of BLAS for Band Matrices. PPAM (2007)
Alfredo Remón, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Parallel LU Factorization of Band Matrices on SMP Systems. HPCC (2006)
José Ignacio Aliaga, José M. Badía, Sergio Barrachina, Maribel Castillo, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Francisco Almeida, Vicente Blanco Pérez, Casiano Rodríguez, Francisco de Sande, Adrián Santos
Parallelization of GSL: The Web Service Interface. PDP (2006)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Solving Stable Sylvester Equations via Rational Iterative Schemes. J. Sci. Comput. 28 (1) (2006)
Alfredo Remón, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Cholesky Factorization of Band Matrices Using Multithreaded BLAS. PARA (2006)
Mercedes Marqués, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Specialized Spectral Division Algorithms for Generalized Eigenproblems Via the Inverse-Free Iteration. PARA (2006)
Gregorio Quintana-Ortí, Robert A. van de Geijn
Improving the performance of reduction to Hessenberg form. ACM Trans. Math. Softw. 32 (2) (2006)
José Ignacio Aliaga, Francisco Almeida, José M. Badía, Sergio Barrachina, Vicente Blanco Pérez, Maribel Castillo, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Casiano Rodríguez, Francisco de Sande, Adrián Santos
Parallelization of GSL on Clusters of Symmetric Multiprocessors. PARCO (2005)
José M. Badía, Peter Benner, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Jens Saak
Parallel Order Reduction via Balanced Truncation for Optimal Cooling of Steel Profiles. Euro-Par (2005)
Sergio Barrachina, Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Parallel Algorithms for Balanced Truncation of Large-Scale Unstable Systems. CDC/ECC (2005)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Parallel Model Reduction of Large Linear Descriptor Systems via Balanced Truncation. VECPAR (2004)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Computing optimal Hankel norm approximations of large-scale systems. CDC (2004)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Computing Passive Reduced-Order Models for Circuit Simulation. PARELEC (2004)
José Ignacio Aliaga, Francisco Almeida, José Manuel Badía-Contelles, Sergio Barrachina-Mir, Vicente Blanco Pérez, María Isabel Castillo, U. Dorta, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Casiano Rodríguez, Francisco de Sande
Parallelization of the GNU Scientific Library on Heterogeneous Systems. ISPDC/HeteroPar (2004)
José Ignacio Aliaga, Francisco Almeida, José M. Badía, Sergio Barrachina, Vicente Blanco Pérez, María Isabel Castillo, U. Dorta, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Casiano Rodríguez, Francisco de Sande
Parallelization of GSL: Performance of Case Studies. PARA (2004)
José Ignacio Aliaga, Francisco Almeida, José M. Badía, Sergio Barrachina-Mir, Vicente Blanco Pérez, María Isabel Castillo, U. Dorta, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Casiano Rodríguez, Francisco de Sande
Parallelization of GSL: Architecture, Interfaces, and Programming Models. PVM/MPI (2004)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Parallel algorithms for model reduction of discrete-time systems. Int. J. Syst. Sci. 34 (5) (2003)
Peter Benner, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Remote Model Reduction of Very Large Linear Systems. IPDPS (2003)
Peter Benner, María Isabel Castillo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Parallel Model Reduction of Large-Scale Unstable Systems. PARCO (2003)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
State-space truncation methods for parallel model reduction of large-scale systems. Parallel Comput. 29 (11-12) (2003)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Numerical solution of discrete stable linear matrix equations on multicomputers. Parallel Algorithms Appl. 17 (2) (2002)
Peter Benner, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Enhanced Services for Remote Model Reduction of Large-Scale Dense Linear Systems. PARA (2002)
Peter Benner, Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Remote Parallel Model Reduction of Linear Time-Invariant Systems Made Easy. VECPAR (2002)
Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Maribel Castillo, Vicente Hernández
Efficient Algorithms for the Block Hessenberg Form. J. Supercomput. 20 (1) (2001)
Rafael Mayo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Vicente Hernández
Parallel solvers for discrete-time algebric Riccati equations. Concurr. Comput. Pract. Exp. 13 (2) (2001)
Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Xiaobai Sun, Robert A. van de Geijn
A Note On Parallel Matrix Inversion. SIAM J. Sci. Comput. 22 (5) (2001)
Maribel Castillo, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí, Vicente Hernández
Parallel Pole Assignment of Single-Input Systems. VECPAR (2000)
Peter Benner, Ralph Byers, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Solving algebraic Riccati equations on parallel computers using Newton's method with exact line search. Parallel Comput. 26 (10) (2000)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
Solving Stable Stein Equations on Distributed Memory Computers. Euro-Par (1999)
Christian H. Bischof, Gregorio Quintana-Ortí
Algorithm 782: Codes for Rank-Revealing QR Factorizations of Dense Matrices. ACM Trans. Math. Softw. 24 (2) (1998)
Gregorio Quintana-Ortí, Xiaobai Sun, Christian H. Bischof
A BLAS-3 Version of the QR Factorization with Column Pivoting. SIAM J. Sci. Comput. 19 (5) (1998)
Gregorio Quintana-Ortí, Enrique S. Quintana-Ortí, Antoine Petitet
Efficient Solution Of The Rank-Deficient Linear Least Squares Problem. SIAM J. Sci. Comput. 20 (3) (1998)
Christian H. Bischof, Gregorio Quintana-Ortí
Computing Rank-Revealing QR Factorizations of Dense Matrices. ACM Trans. Math. Softw. 24 (2) (1998)
Peter Benner, Enrique S. Quintana-Ortí, Gregorio Quintana-Ortí
A Portable Subroutine Library for Solving Linear Control Problems on Distributed Memory Computers. Wide Area Networks and High Performance Computing (1998)