Visitors

Visitors in 1999

• Roman Wyrzykowski (email: roman@matinf.pcz.czest.pl), Department of Mathematics and Computer Science, Technical University of Czestochowa, Dabrowskiego 73, PL-42-200 Czestochowa, Poland
  Roman attended the LAWRA Workshop December 3-4 1999 and he worked at UNI1#1C to December 9 1999.
• Raimondas Ciegis (email: Raimondas.Ciegis@fm.vtu.lt), Institute of Mathematics and Informatics and Vilnius Gediminas Technical University, Akademijos 4, LT-2600, Vilnius, Lithuania
  Raimondas attended the LAWRA Workshop December 3-4 1999 and he worked at UNI1#1C to December 9 1999.
• Sivan Toledo, Computer Science Department, School of Mathematical Sciences, Tel-Aviv University, Tel-Aviv, Israel
  Sivan was an invited speaker at the LAWRA Workshop December 3-4 1999.
• Carl Tengwall, IBM of Sweden, Stockholm, Sweden
  Carl was an invited speaker at the LAWRA Workshop December 3-4 1999.
• Ernst J. Haunschmid, Technical University of Vienna, Austria
  Ernst was an invited speaker at the LAWRA Workshop December 3-4 1999.
• Isak Jonsson, Computer Science Department, Umeå University, Umeå, Sweden
  Isak was an invited speaker at the LAWRA Workshop December 3-4 1999. He worked at UNI1#1C from November 29 to December 4 1999.
• Jack Dongarra, Computer Science Department, University of Tennessee, Knoxville, USA and Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, USA
  We discussed LAPACK95 and LAWRA projects. Jack was an invited speaker at the LAWRA Workshop December 3-4 1999.
• Gabriela Gueorguieva from Rousse, Bulgaria was employed for the LAWRA project for the period of Oct 23 - Dec 22, 1999.
• Antoine Petitet, Department of Computer Science of University of Tennessee at Knoxville, Tennessee, USA.
  Antoine gave an IMM/UNI1#1C seminar on "A Numerical Linear Algebra Problem Solving Environment Designer's Perspective". We discussed Lapack, Lapack90, ScaLAPACK and Lawra projects. Antoine visited us in June 21-25 1999.
• Fred Gustavson, IBM T.J. Watson Research Center, USA. Fred gave an IMM/UNI1#1C seminar on "A New Parallel Algorithm for Tridiagonal Symmetric Positive Definite Systems of Equations". We discussed the IBM/UNI1#1C/Umeå/UTK collaboration on Linear Algebra With Recursive Algorithms (LAWRA) project. We also had a meeting with the local IBM representatives and Tor Bloch. Fred was an invited speaker at the LAWRA Workshop December 3-4 1999. He visited us in June 19-29, November 27-30 and December 1-5 1999.
• Plamen Yalamov, University of Rousse, Rousse, Bulgaria. Plamen had temporally been employed at UNI1#1C for 3 months developing the Recursive Matrix Factorization Algorithm with Bunch-Kaufman pivoting, where the matrix is symmetric and indefinite. Plamen is also involved in LAPACK90 project. He developed series of test programs for LAPACK90. He was also involved in developing examples for the LAPACK90 Users' Guide. Plamen was an invited speaker at the LAWRA Workshop December 3-4 1999. He visited us June 15-30, July, August and September 1-15, November and December 1999.
• Minka Marinova, University of Rousse, Rousse, Bulgaria. Minka had temporally been employed at UNI1#1C for 3 months adapting the Lapack77 test programs for Lapack90. April, May and June, 1999.
• Plamen Yalamov, University of Rousse, Rousse, Bulgaria. Plamen had temporally been employed at UNI1#1C for 3 months developing the Recursive Matrix Factorization Algorithm with Bunch-Kaufman pivoting, where the matrix is symmetric and indefinite. Plamen is also involved in LAPACK90 project. He developed series of test programs for LAPACK90. He was also involved in developing examples for the LAPACK90 Users' Guide. January, February and March, 1999.

Visitors in 1998

• Sven Hammarling, Numerical Algorithms Group Ltd., Oxford, England, Sven gave a two days lecture on BLAS, PBLAS, LAPACK and ScaLAPACK. We also were discussing together with V. Alan Barker the LAPACK'90 Users' Guide. November 13-16, 1998.
• Jack Dongarra, University of Tennessee and Oak Ridge National Laboratory, Knoxville, Tennessee, USA. Jack gave a two days lecture on High-Performance Computing, Numerical Linear Algebra, LAPACK, ScaLAPACK, BLACS and BLAS. Discussion with V. Alan Barker on the LAPACK90 Users' Guide and discussion on Recursive Dense Linear Algebra Algorithms (with Fred Gustavson by telephone). October 13-16, 1998.
• Piotr Roszkowski, Department of Applied Mathematics of the University of Warsaw, Warsaw, Poland. Piotr has got a master project on Recursive Dense Linear Algebra Algorithms. One week in August, 1998.
• Plamen Yalamov, University of Rousse, Rousse, Bulgaria. Plamen had temporally been employed at UNI1#1C for 3 months developing the Recursive Matrix Factorization Algorithm with Bunch-Kaufman pivoting, where the matrix is symmetric and indefinite. Plamen is also involved in LAPACK90 project. He developed series of test programs for LAPACK90. He was also involved in developing examples for the LAPACK90 Users' Guide. August, September and October, 1998.
• Jianping Chen, Nantong Institute of Technology, Nantong, Jiangsu, P. R. of China. Jianping had temporally been employed at UNI1#1C for 3 months developing the recursive algorithm for numerical dense linear algebra. July, August, September, 1998.
• Carl Tengwall, IBM of Sweden, Sweden. We discussed the IBM/UNI1#1C/Umeå/UTK collaboration on High Performance Linear Algebra Algorithms for the IBM SMP computers. Carl visited us twice, for one day, in June and August 1998.
• Fred Gustavson, IBM T.J. Watson Research Center, USA. Fred gave two IMM/UNI1#1C seminars on on High Performance Recursive Dense Linear Algebra Algorithms. We discussed the IBM/UNI1#1C/Umeå/UTK collaboration on High Performance Linear Algebra Algorithms for the IBM SMP computers. We also had a meeting with local IBM representatives and Carl Tengwall. Fred visited us twice in June 1998.
• Alexander Karaivanov, University of Rousse, Rousse, Bulgaria. Alexander had temporally been employed at UNI1#1C for 2.5 months developing the Mathematica Interface to NetSolve. May, June and July, 1998.
• Sven Hammarling, Numerical Algorithms Group Ltd., Oxford, England, We were discussing together with V. Alan Barker the LAPACK'90 Users' Guide. Two days in the second part of March 1998.
• Krassimir Georgiev, Parallel Computing Group of the Bulgarian Academy of Sciences, Sofia, Bulgaria. Krassimir had temporally been employed at UNI1#1C for 2.5 months developing the recursive algorithm for numerical dense linear algebra. March, April to May 15, 1998.

Visitors in 1997

• Mietek Piliczuk, Regional Computer Centre at the University of Mining and Metallurgy, Krakow, Poland. Mietek studied the IBM SP UNIX operating system. December 15-22, 1997.
• Carl Tengwall, IBM of Sweden, Sweden. Carl presented a lecture "The Evolution of the IBM RS6000 SP Architecture and Performance. We discussed the IBM/UNI1#1C/Umeå/UTK collaboration on High Performance Linear Algebra Algorithms for the IBM SMP computers. December 2-3, 1997.
• Bo Kågström, University of Umeå, Sweden. Bo presented a lecture "Algorithms, Library Software, and User Environments for High-Performance Computing Applications. We discussed the IBM/UNI1#1C/Umeå/UTK collaboration on High Performance Linear Algebra Algorithms for the IBM SMP computers. December 2-3, 1997.
• Fred Gustavson, IBM T.J. Watson Research Center, USA. Fred gave a series of lectures on High Performance Linear Algebra Subprograms. We discussed the IBM/UNI1#1C/Umeå/UTK collaboration on High Performance Linear Algebra Algorithms for the IBM SMP computers. December 1-6, 1997.
• Mishi Derakhshan, Numerical Algorithms Group, Oxford, England. Mishi presented a lecture "Design and Development of a Portable Parallel Library, December 3-4, 1997
• John Brown, Silicon Graphics Inc., USA. John gave a lecture "OpenMP: A New Standard for Parallel Application Development, December 3, 1997.
• Petter E. Bjørstad, University of Bergen, Norway. Petter gave a lecture "The value of good parallel algorithms. December 2-3, 1997.
• Susanne M. Balle, Digital Equipment Corporation, USA. Susanne gave a lecture "A Parallel Algorithm for Computing Eigenvalues of Very Large Real Symmetric Matrices on Message Passing Architectures". We discussed the Digital/UNI1#1C/IMM collaboration on a High Performance Numerical Analysis Software for Digital High Performance Computers. December 1-3, 1997.
• Marian Bubak, Department of Computer Science of the University of Mining and Metallurgy, Krakow, Poland. We worked together on LAPACK90. September 15-22, 1997.
• Scott Baden, University of California at San Diego, Department of Computer Science and Engineering, California, USA. Scott gave a seminar on ``KeLP: A Retargetable Infrastructure for High Performance Scientific Applications''. September 12, 1997.
• Henri Casanova, University of Tennessee Knoxville, Tennessee, USA. We started ``The NetSolve Project in Denmark''. August 5-12, 1997.
• Jack Dongarra, University of Tennessee and Oak Ridge National Laboratory, Knoxville, Tennessee, USA. Jack gave a seminar on ``Problem Solving Environments and NetSolve: A Network Server for Solving Computational Science Problems''. June 16, 1997.

Some visitors in 1995 and 1996

• John Brown, Silicon Graphics / Cray Research Computer Corporation, Mountain View, California, USA. We had several papers on Parallel Scientific Computing (see publications). June, 1994. August 1995 and August 1996. The visits were no longer than a week of each.
• Antoine Petitet, University of Tennessee Knoxville, Tennessee, USA. Antoine introduced the ScaLAPACK Library for the UNI1#1C IBM-SP2 computer. Four weeks in August 1995.
• Jack Dongarra, University of Tennessee and Oak Ridge National Laboratory, Knoxville, Tennessee, USA. We organized together the PARA94, PARA95 and PARA96 Workshops. Jack visited UNI1#1C for several days around the Workshops. August 1995 and August 1996. I also run a few projects with Jack, for example LAPACK90, test programs for ScaLAPACK, NetSolve.
• Sven Hammarling, Numerical Algorithms Group Ltd., Oxford, England, Sven implemented the PVM Parallel NAG Library for the UNI1#1C SGI Power Challenge computer. We also have another collaborations, for example LAPACK90. Sven visited me in July 1995 for a week.
• Ken McDonald, Numerical Algorithms Group Ltd., Oxford, England. Ken implemented the PVM Parallel NAG Library for the IBM SP2 computer and introduced it for the UNI1#1C users. Ken visited UNI1#1C in August 1995 for two weeks.
• Stefano Salvini, Numerical Algorithms Group Ltd., Oxford, England. He experimented LAPACK for SMP computers using UNI1#1C SGI Power Challenge. Stefano visited UNI1#1C three times. December 1995, May 1996 and August 1996 for a few (two, three) weeks.
• L. Susan Blackford, University of Tennessee Knoxville, Tennessee, USA. Susan worked for LAPACK and ScaLAPACK. She made a ScaLAPACK tutorial on PARA96. I have collaboration on LAPACK90. Two weeks in August 1996.
• Henri Casanova, University of Tennessee Knoxville, Tennessee, USA. Henri gave a seminar on NetSolve. A few days in December 1997.
• Marian Bubak, Department of Computer Science of the University of Mining and Metallurgy, Cracow, Poland. Marian visited UNI1#1C for a week several times in 1995 and 1996. He worked using parallel computers.

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