Pawan Kumar
IIIT, Hyderabad,
India
Mobile : (+91) 7005129418
Email:
pawan.kumar@iiit.ac.in
Assistant Professor, 2017-now, IIIT, Hyderabad, India
Postdoc, 2014-2016, FU Berlin, Germany
Postdoc, 2013- 2014, Fraunhofer ITWM, Kaiserslautern, Germany
Postdoc, Sept. 2011-July 2013, KU Leuven and exascience lab, Leuven, Belgium
PhD (Highest honours (``très honorable'' in French)), 2010, INRIA, France
MS, 2007, Indian
Institute of Technology, Guawahati, India
English (Fluent), French (Intermediate), German (Beginner)
- Familiarity with: HPC programming: C, C++, Fortran 77/90, MPI, GPI
(Global Address Space Programming, PGAS model) OpenMP,
Cilk plus, C++-11 threads, Parallel analysis tools: Scalsca, TAU analysis tool, Vtune,
Likwid, HDF5, Paraview, Web tools: XML, HTML, PHP, CSS, Version
Control: SVN, GIT,
Other Protyping tools: MATLAB, Octave, Maple, mexfile (Matlab, C, Fortran
interface), Documentation: Latex
- Numerical libraries used: FreeFEM++, UMFPACK, SuperLU,
BLAS, Sparse BLAS, Goto BLAS, MKL (sparse and dense), PLASMA, METIS, ITSOL, pARMS,
Peano (Grid traversal software) PETSc (basic), HYPRE, etc
- Softwares created:
- COMPRE: Fortran 77/90 codes for preconditioning
structured PDE problems by combinative preconditioning (see the
paper below)
- ADDS: A class of parallel non-overlapping domain
decomposition methods written in cilk plus suitable for shared
memory architecture. A distributed memory variant is under construction
- Operating Systems: Windows, Unix (preferred!)
Solvers for Computer Vision Problems:
- S. Das, S. Katyan, P. Kumar, A Deflation Based Fast and Robust Preconditioner for Bundle Adjustment, accepted in WACV 2021.
- S. Katyan, S. Das, P. Kumar, Multigrid Preconditioned Solver for Bundle Adjustment, accepted in WACV 2020.
- S. Das, S. Katyan, P. Kumar, Domain Decomposition Based Preconditioned Solver for Bundle Adjustment, accepted in NCVPRIPG 2019.
On Preconditioners/Linear Solvers:
- P. Kumar, Fast Preconditioned Solver for Truncated Saddle Point Problem in Nonsmooth Cahn–Hilliard Model, Book chapter, Recent Advances in Computational Optimization, 2016
- P. Kumar, L. Grigori, F. Nataf, and Q. Niu, Combination
preconditioning based on relaxed nested factorization and
tangential filtering decomposition, International Journal of
Computer Mathematics, 2015, doi:10.1080/00207160.2014.998208
- P. Kumar, Aggregation based on graph matching and inexact
coarse grid solve for algebraic multigrid, accepted,
Int. J. Comp. Math., 2013,
http://dx.doi.org/10.1080/00207160.2013.821115
On Fourier Analysis
- Q. Niu, L. Grigori, P. Kumar, and F. Nataf, Modified
tangential frequency filtering decomposition and its Fourier
analysis, Numerische Mathematik, Volume 116, issue 1, p
123-148, 2010, doi: 10.1007/s00211-010-0298-3
On High Performance Computing/Scientific Computing
- S. Rampalli, N. Sehgal, I. Bindlish, T. Tyagi, Efficient FPGA Implementation of Conjugate Gradient Methods for Laplacian System using HLS, short paper, FPGA 2019
- P. Kumar, Multilevel Communication Optimal Least Squares
Solver, IEEE proceedings, International Conference on
Computational Sciences, ICCS, vol. 51, p. 1838-1847, 2015, doi: 10.1016/j.procs.2015.05.410
- P. Kumar, Communication Optimal Least Squares Solver,
accepted, IEEE proceedings, 16th international conference on high
performance computing and communications, HPCC, 20-22 August 2014,
Paris, France
- P. Kumar, Multi-threaded direction preserving
preconditioners, IEEE proceedings, 13th international symposium
on parallel and distributed computing, ISPDC, 23-27 June 2014,
p. 148-153, Marseille (Porquerolles island), France
- P. Kumar, S. Markidis, G. Lapenta, K. Meerbergen, D. Roose,
High Performance Solvers for Implicit Particle in Cell
Simulation, ICCS, vol. 18, Procedia Computer Science, pp 2396-2405,
2013, http://dx.doi.org/10.1016/j.procs.2013.05.396
- P. Kumar, K. Meerbergen, and D. Roose, Multi-threaded
nested filtering factorization preconditioner, vol. 7782, LNCS, pp. 220-234, 2013
Reports under submission
- P. Kumar, L. Grigori, Q. Niu, F. Nataf, Fourier
analysis of Modified Nested Factorization Preconditioner for
Three-Dimensional Isotropic Problems, HAL, INRIA report,
2019.
- L. Grigori, P. Kumar, F. Nataf, and K. Wang, A class of
multilevel parallel preconditioners, submitted as INRIA
tech. report no. 7410, available online at:
http://hal.archives-ouvertes.fr/docs/00/52/41/10/PDF/Paper.pdf
- Ripple Center of Excellence: Distributed Optimization and Blockchain
- INAE Travel grant
- MATRICS grant: Solvers for saddle point problems
- ERCIM: Marie Curie Actions Fellowship
- Marie-Curie ERCIM fellowship for independent
postdoctoral research, 2013-2014
- European CORDIS scholarship (applied by Supervisor) for PhD
studies at INRIA, Saclay, 2007-2010
- Secured a percentile of 96.6 (rank 88/2500) in all India applied
Mathematics category in GATE (Graduate Aptitude Test in
Engineering, India), 2007
- Junior summer research scholarship from JNCASR bangalore,
India to conduct undergraduate research for two months, 2005
- Certificate of excellence for 3rd rank in Mathematics
department in north eastern hills university in 2005
- Spring 2021
- Monsoon 2020
- Discrete Structures
- Probability and Statistics
- Spring 2020
- Introduction to Parallel Scientific Computing
- Monsoon 2019
- Topics in Applied Optimization
- Discrete Structures
- Spring 2019
- Introduction to Parallel Scientific Computing
- Topics in Optimization on Manifolds
- Monsoon 2018
- Discrete Structures
- Topics in Applied Optimization
- Spring 2018
- Introduction to Parallel Scientific Computing
- Linear Algebra 2018
- Monsoon 2017
- Discrete Mathematics and Algorithms
- Algorithms
- Spring 2017
- Introduction to Parallel Scientific Computing
Scalable robust Schur complement preconditioners
using PGAS (performed under ERCIM fellowship), accepted and
completed under MArie-Curie Fellowship at Fraunhofer ITWM.
- Multilevel Communication Optimal Least Squares Solver,
HPCC, 1-3 June 2015, Reykjavic, Iceland
- High Performance Solvers for Implicit Particle
in Cell Simulations, ICCS, 5-7 June 2013, Barcelona, Spain
- Multi-threading and auto-vectorization for direction
preserving preconditioners, SIAM conference on Computational
Science and Engineering, 25 February - 1 March 2013, Boston, USA
- Parallel aggregation based algebraic multigrid,
International Conference on Domain Decomposition, 25-29 June 2012,
Rennes, France
- Purely algebraic domain decomposition methods for the
incompressible Navier-Stokes equation, SIAM LA, 18-22 June
2012, Valencia, Spain
- Multithreaded row and column sum based preconditioners,
PARA 10-13 June 2012, Helsinki, Finland
- Purely algebraic domain decomposition methods for the
incompressible Navier-Stokes equation, Workshop on Recent
Developments in the Solution of Indefinite Systems, April 17,
2012, Eindhoven, The Netherland
- Combination preconditioning based on relaxed nested
factorization and tangential filtering preconditioner,
IHP, 2008, Paris, France
- Gershgorin circles and Poincare separates, ESS sem.
series, KU Leuven, Belgium
- Research visit (Prof. M. Gander) University of Geneva, Geneva, 2-6 June 2014
- Research visit (Prof. A. Napov) Universite Libre de Bruxelles, 7-11 April 2014
- Winter school on Hierarchical matrices, Leipzig,
Germany, 2014
- Visit Lawrence Berkeley National Lab.:, 4th March 2013,
Berkeley, California
- Ninth VI-HPS Tuning Workshop, 23-27 April 2012,
St-Quentin-en-Yvelines, France
- INRIA school on solution of large sparse linear systems,
Sophia-antipolis, France, 2008
- Winter school on Hierarchical matrices, Leipzig,
Germany, 2008
- Workshop on FreeFEM++, 14-15 September, 2009, IHP,
Paris, France
- Playing chess, biking, travelling and cooking
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