NA Digest Sunday, March 13, 2011 Volume 11 : Issue 11

Today's Editor:
Daniel M. Dunlavy
Sandia National Labs

Submissions for NA Digest:

Mail to

Information via email about NA-NET:

Mail to


From: Joseph Grcar <> <>
Date: Sun, 13 Mar 2011 01:47:20 -0800
Subject: Question about Integer Elimination

Hello NA Digest,

Has there been any work on Gaussian elimination performed in ways to
preserve integer coefficients? I only know of one paper by Erwin
Bareiss in 1968.



From: Robert van de Geijn <> <>
Date: Fri, 11 Mar 2011 09:44:31 -0600
Subject: Xtreme(ly rapid) dense linear algebra library dev, Part II

A few weeks ago, I posted a video on rapid development of matlab code
that used the transformation of a generalized Hermitian eigenvalue
problem to the standard form as an example. This got a surprising
number of views, which encouraged me to put a second video together.

This time, I wrote notes on high-performance Cholesky factorization.
These should be appropriate for a beginning graduate level course on
numerical linear algebra or an upper division undergraduate course. I
then made a video of the rapid coding of not only M-script (matlab)
code, but also C implementations based on BLAS-like routines using our
libflame library (a modern replacement for LAPACK). In about 45
minutes, I implement three unblocked and three blocked algorithms.
The best implementation beats LAPACK performance (since LAPACK appears
to implement a suboptimal variant) and matches the implementation in
our libflame library.

All can be found at

Robert van de Geijn


From: "Marina A. Epelman" <> <>
Date: Wed, 09 Mar 2011 17:33:37 -0500
Subject: New issue of INFORMS Optim Society newsletter

The INFORMS Optimization Society is very pleased to announce the first
issue of the re-designed Optimization Society newsletter! Along with
announcements and chair's column, it includes 4 articles by the most
recent OS prize winners describing their award-winning work. We invite
you to check out the new issue at

Our plan is to put out an annual issue, possibly expanding to
twice-annual issues in the future if time and resources permit. Please
contact the newsletter editor, Shabbir Ahmed (, with
ideas and suggestions, as well as compliments.

Marina A. Epelman
Secretary/Treasurer, INFORMS OS


From: "R. Bradley Shumbera" <> <>
Date: Fri, 11 Mar 2011 15:46:39 -0500
Subject: Workshop in Wave Propagation, KAUST, May 2011

Multiscale Modeling, Advanced Discretization Techniques, and
Simulation of Wave Propagation
May 7-8, 2011
King Abdullah University of Science and Technology (KAUST)
Thuwal, Kingdom of Saudi Arabia

On May 7-8, 2011, the KAUST Global Research Collaborative (GRC) will
be hosting a workshop on "Multiscale Modeling, Advanced Discretization
Techniques, and Simulation of Wave Propagation" at the King Abdullah
University of Science and Technology (KAUST) in Thuwal, Kingdom of
Saudi Arabia. With the goal of facilitating the exchange of ideas to
improve modeling and simulation predictions, this workshop will bring
together researchers working in the areas of advanced discretization
techniques, wave propagation in heterogeneous and random media,
subgrid models, uncertainty quantification, solvers, geophysics, and
high-performance computation and visualization tools for large-scale
wave simulations. The workshop will consist of a number of invited
presentations and include a poster session. Registration is free and
those interested should visit
and/or contact for more information and
registration. Along with GRC, support will be provided by a mixture of
funds from KAUST, Texas A&M University's (TAMU) Institute for Applied
Mathematics and Computational Science (IAMCS), and TAMU's Institute
for Scientific Computation (ISC).


From: "E. E. Tyrtyshnikov" <> <>
Date: Fri, 11 Mar 2011 22:11:40 +0300
Subject: Conference on Matrix Methods, Russia, Jun 2011

APPLICATIONS (previous title: "Matrix methods and operator equations")
June 22 - 25, 2011, Moscow, Russia
(arrival on Tuesday, June 21; departure on Sunday, June 26)

Institute of Numerical Mathematics, Russian Academy of Sciences;
Lomonosov Moscow State University

Dario Bini, Alexander Guterman, Roger Horn, Volker Mehrmann, Maxim
Olshanskii, Vadim Olshevsky, Stefano Serra-Capizzano, Hans Schneider,
Gilbert Strang, Eugene Tyrtyshnikov (chair), Yuri Vassilevski

We plan to have some plenary talks and three parallel sessions:

The deadline for the registration is March 31, 2011.

Conference web-site is located at

In order to participate in this conference, please register on-line

Accommodation details are to be found

For the correspondence related to this conference please use the
specially installed CONFERENCE E-MAIL:


From: Andrea Pacifici <>
Date: Tue, 8 Mar 2011 06:28:21 -0500
Subject: CFP, CTW 2011, Italy, Jun 2011


10th Cologne-Twente Workshop on Graphs & Combinatorial Optimization
Frascati (Rome), Italy, June 14-16, 2011.

- Authors wishing to submit a contribution, should prepare an extended
abstract of at most 4 pages* by March 14th, 2011 following the
guidelines on the conference website.

- Session in memory of Prof. Bruno Simeone*. His friends and
colleagues Ronald Becker; Endre Boros; Stefan Foldes; Martin
C. Golumbic; Pierre Hansen, Yves Crama will present their and Bruno's
past and recent achievements.

- A special proceedings volume of Discrete Applied Mathematics,
containing full length papers, refereed according to the high
standards of DAM, is planned.

- Deadline for abstract submission: Monday, March 14th, 2011;
- Acceptance notice: April 15th, 2011;
- Conference dates: June 14-16th, 2011.


From: Pamela Bye <> <>
Date: Fri, 11 Mar 2011 06:36:33 -0500
Subject: IMA Nonlinearity and Coherent Structures, UK, Jul 2011

6-8 July 2011 University of Reading, UK

Aim and Scope. Nonlinear phenomena are ubiquitous in the natural
world. Very often the nonlinearity coexists with a degree of order,
and the associated coherent structures offer a solid reference point
for theory and experiments. A noteworthy example are the
so&#8208;called solitons, localised waves propagating nonlinearly and
yet displaying many features of linearity. The theoretical
developments in the field of nonlinear evolution phenomena and the
mathematical study of coherent structures are relevant to many
disparate fields, including nonlinear optics, random media, atmosphere
and ocean dynamics, general relativity, high-energy particle physics,
plasma physics, fluid and solid mechanics, Bose-Einstein condensation,
nonlinear electrical circuits, and reaction&#8208;diffusion processes.
The aim of this meeting is to bring together researchers on the
theoretical aspects of these problems with researchers in the many
fields of potential application, to discuss recent developments,
methodologies and results, and to encourage communication and

Invited Speakers: Mark Ablowitz IMA Distinguished Lecturer (University
of Colorado at Boulder); Adrian Constantin (University of Vienna);
Roger Grimshaw (Loughborough University); Peter Janssen (ECMWF); Simon
Maskell (QinetiQ); Alan Osborne (University of Torino and Office of
Naval Research in Arlington, Virginia); Sergey Turytsin (Aston

Further information visit the conference pages at:
Scientific queries: Beatrice Pelloni,
General conference queries:


From: Adelia Sequeira <>
Date: Sun, 13 Mar 2011 15:57:53 +0000
Subject: SIMBIO, Vrije Universiteit Brussel, Belgium, Sep 2011

The Vrije Universiteit Brussel, the von Karman Institute and the
Technical University of Lisbon are organizing an ECCOMAS Thematic
Conference on

Simulation and Modeling of Biological Flows, 21-23 September 2011 at
Vrije Universiteit Brussel, Brussels, Belgium (SIMBIO 2011).

In recent years there is a growing interest in the simulation and
modeling of flows in living organisms. The main applications are
related to blood flow in the vessels and airflow in the respiratory
tract. But also other applications such as e.g. fluid and solute
transport in bones, artificial blood pumps, phonation and speech
production fall into the category of biological flows.

The aim of the present thematic conference is to bring together
scientists and researchers working in this field and providing them a
forum for discussion and technical exchanges in this rapidly growing

Deadline for submitting a 2 page abstract is April 1, 2011.

More information can be found on the website:


From: Max Jensen <> <>
Date: Sun, 13 Mar 2011 07:46:59 -0500
Subject: Lecturer in Applied Mathematics, Durham, UK

Durham University, UK
Department of Mathematical Sciences
Lecturer in Applied Mathematics
Salary: 29972 GBP - 39107 GBP

Closing Date: 26 April 2011

The successful candidate will have an excellent research record in an
area of Applied Mathematics other than theoretical particle physics or
general relativity. Preference may be given to candidates with
research interests which mesh with existing ones in the department:
continuum mechanics, computational applied mathematics, partial
differential equations, mathematical biology/medicine, applied
dynamical systems. Applications from holders of personal fellowships
would be welcome. For appointment at Grade 8 candidates will need to
provide evidence of relevant teaching experience at University level
and a significant record of publications at international level.

For the job description and further particulars see

For informal enquiries contact Professor Brian
Straughan<> <>


From: BCAM - Basque Center for Applied Mathematics <>
Date: Tue, 8 Mar 2011 15:37:05 +0100
Subject: Positions in CFD at BCAM, Spain

BCAM ( is a Research Center in Applied Mathematics,
whose mission is to develop high quality interdisciplinary
research. With an international team of researchers, the scientific
program is structured in several research areas covering various
fields of Applied Mathematics. BCAM is a recently established center
with the ambition of becoming a reference center in the applied

During the last fifty years, BALTOGAR ( has developed
the technology of industrial fans, particularly high performance
fans. Since 1995 it is part of the BRUNNSCHWEILER group, an
organization that employs three hundred people in various
countries. Baltogar is aiming to develop new products, (axial and
centrifugal compressors) and increase the effort in applied and basic
Fluid Dynamics research.

BCAM and BALTOGAR decided to launch an innovative Joint Research Line
on CFD, and now we are opening an International Call for Researchers
in order to build the team, including Senior Researcher and
Computational Software Engineer:

IC2011-CFD-RP for Research Professor, skills required:

Knowledge and master of the following techniques:

* Modelling in Fluid Mechanics.
* Applied Fluid Mechanics and, in particular, Turbomachinery.
* Numerical methods for Partial Differential Equations.
* Optimization.
* Proven experience in the development of SW code in CFD (C++,
open-source projects, commercial SW packages, etc.).
* Leading competences to manage research teams and achieve grants and
* Pro-active attitude and willingness to develop a challenging
research project.

IC2011-CFD-CSE for Computational Software Engineer, skills required:

* A Master in software engineering, computer science or comparable
from an internationally recognized university,
* Good knowledge and experience in design and development of large
computational/numerical software packages,
* Excellent knowledge in C++ and MPI,
* Good knowledge of CUDA,
* Interest in computational physics,
* Pro-active attitude and willingness to develop a challenging
research project.

Applications must be submitted on-line
at: before April 4th 2011. As part of
internal commitment and policy to enhance the attractiveness of the
research career in the Basque Country, candidates can expect support
and attention for settling down, including those more complex
situations, with mates in the R & D business.

More information can be found at: http://www.bcamath.orghttp://www.baltogar=

We kindly ask you to distribute this call among colleagues and
potential candidates. Please do not hesitate to contact us for any
additional information: IC2011@BCAMATH.ORG .


From: Philipp Schlatter <> <>
Date: Sun, 13 Mar 2011 13:56:57 -0500
Subject: Postdoc Positions at Linn=E9 FLOW Centre at KTH, Sweden

The "Turbulence Group" within the Linn=E9 FLOW Centre at KTH in
Stockholm (Sweden) invites applicants for two postdoctoral positions
in the areas of simulation of turbulent wall-bounded flows and
turbulent combustion. We are presently looking for candidates who can
start as soon as possible, or in the second half of 2011.

Applicants should have a PhD degree, or soon receive one, in a
relevant scientific field. We are in particularly looking for
candidates with a strong background in direct or large-eddy
simulations of turbulent flows with experience/interest in large-scale
numerical simulations and data processing. Experience in MPI
programming and performing simulations on parallel computers is
advantageous. Closing date: April 10, 2011

For further information and instructions for application please see
the announcements:



From: Isabel Figueiredo <> <>
Date: Tue, 8 Mar 2011 17:36:35 -0500
Subject: Postdoc Position in Comp Math at University of Coimbra

Post Doctoral Research Position

The UTAustin|Portugal Program and the Department of Mathematics of the
Faculty of Sciences and Technology of the University of Coimbra,
Portugal (under the project below) invite applications for an one-year
Postdoctoral Position in Computational Mathematics, beginning October

The focus of the research is on imaging sciences and scientific
computing. It involves variational image processing, image analysis,
partial differential equations, numerical analysis, optimization,
visualization, and inverse problems in imaging, with applications in
medicine and emphasis on endoscopic images.

Applicants should have a PhD in Mathematics or Computational Sciences
and Engineering (preferably obtained after December 31, 2006). The
position obeys to the Portuguese scholarship system and the
corresponding salary is =801495 per month (tax free). No teaching duties
are associated with the position.

Applicants should send by email to the following
- curriculum vitae (publication list included)
- statement of research interests (one page maximum, describing
concisely scientific interests and the relation with the proposed
post doctoral position)
- names and email-addresses of at least two scientists willing to
provide references.

The deadline for applications is May 15, 2011.

This position is funded by the research project UTAustin/MAT/0009/2008
(UTAustin|Portugal Program,

Contact for further information: Isabel M. Narra Figueiredo


From: Claude Brezinski <>
Date: Fri, 11 Mar 2011 09:18:39 +0100
Subject: Contents, Numerical Algorithms, 56(4)

Table of contents for Numerical Algorithms, Volume 56, Number 4.

A-posteriori residual bounds for Arnoldi=92s methods for nonsymmetric
eigenvalue problems. Kumar Dookhitram, Ravindra Boojhawon, Ashvin
Gopaul, Muddun Bhuruth

Semilocal convergence of a multipoint fourth-order super-Halley method
in Banach spaces. Xiuhua Wang, Chuanqing Gu, Jisheng Kou

A novel implicit finite difference method for the one-dimensional
fractional percolation equation. S. Chen, F. Liu, V. Anh

A non-monotone line search multidimensional filter-SQP method for
general nonlinear programming. Chao Gu, Detong Zhu

Analytical approximations for the periodic motion of the Duffing
system with delayed feedback. Xiangcheng You, Hang Xu

A short tale of long tail integration. Xiaolin Luo, Pavel
V. Shevchenko

Symplectic exponentially-fitted four-stage Runge=96Kutta methods of the
Gauss type. Guido Vanden Berghe, Marnix Van Daele


From: Raimondas Ciegis <> <>
Date: Mon, 7 Mar 2011 15:36:09 -0500
Subject: Contents, Mathematical Modelling and Analysis, 16(1)

Mathematical Applications, Numerical Analysis and Differential
Volume 16, Number 1, 2011


A. Stikonas. Investigation of Characteristic Curve for
Sturm-Liouville Problem with Nonlocal Boundary Conditions on
Torus. 1-22

A. Gritsans and F. Sadyrbaev. Two-Parameter Nonlinear Oscillations:
The Neumann Problem. 23-38

J. Genys and A. Laurincikas. Joint Weighted Limit Theorems for
General Dirichlet Series. 39-51

N. Sergejeva. On Some Fucik Type Problem with Cubic
Nonlinearity. 52-61

V. Polevikov and L. Tobiska. ADI Approach to the Particle Diffusion
Problem in Magnetic Fluids. 62-71

R. Garunkstis and J. Steuding. Questions Around the Nontrivial Zeros
of the Riemann Zeta-Function -- Computations and Classifications --.

M. Bras. Nordsieck Methods with Inherent Quadratic Stability. 82-96

R. Kriauzien{\.e} and A. Krylovas. Asymptotical Analysis of Some
Coupled Nonlinear Wave Equations. 97-108

R. Avenhaus and T. Krieger. Unannounced Interim Inspections: Do False
Alarms Matter?. 109-118

G. Shishkin, L.P. Shishkina, K. Cronin, M. Stynes and M. Viscor.
A Numerical Method for a Stefan-Type Problem. 119-142

I. Yermachenko. Maximum Principle and the Fourth Order Boundary Value
Problem. 143-152

A. Pedas and E. Tamme.Product Integration for Weakly Singular
Integro-Differential Equations. 153-172

End of NA Digest