NA Digest Monday, February 22, 2010 Volume 10 : Issue 08

Today's Editor:
Tamara G. Kolda
Sandia National Labs

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From: Michael Friedlander <>
Date: Fri, 19 Feb 2010 16:25:55 -0500
Subject: SPOT - A linear-operator toolbox for Matlab

We are pleased to announce the release of

SPOT -- A linear-operator toolbox for Matlab, v1.0p

The SPOT Toolbox brings the expressiveness of Matlab's built-in matrix
notation to problems for which explicit matrices are not
practical. SPOT operators look and feel like regular Matlab
matrices, but are implicitly defined. SPOT includes a collection of
fast operators that can be stitched together using familiar Matlab
commands to form more complex operators.

The following example builds up a 1000-by-1000 circulant operator
using the discrete Fourier transform:

>> >> n = 1000; x = (1:n)'; % the first column defines this operator
>> >> F = opDFT(n); % instantiate a DFT operator
>> >> s = sqrt(n)*F*x; % eigenvalues of the circulant
operator C
>> >> C = real( F'*opDiag(s)*F ); % the circulant operator C
>> >> w = C*x; % apply C to a vector
>> >> y = C'*w; % apply the adjoint of C to a vector
>> >> z = C(end:-1:1,:)*y; % reverse the rows of C and apply to
a vector
>> >> double( C(1:5,1) )' % extract a few elements of the
first column
ans =
1 2 3 4 5

In this example, no explicit matrices are formed. Compare the memory
footprints of the explicit matrix against the SPOT operator:

>> >> A = gallery('circul',x)';
>> >> whos A C
Name Size Bytes Class Attributes

A 1000x1000 8000000 double
C 1000x1000 70730 opReal

SPOT is available under the GNU Public License. We are glad to hear
from users -- please send your comments and suggestions!

Michael and Ewout


From: Luigi Brugnano <>
Date: Tue, 16 Feb 2010 14:36:21 +0100
Subject: Hamiltonian BVMs

Dear All,

we have collected the basic facts about Hamiltonian BVMs (HBVMs),
a new class of energy preserving methods for polynomial Hamiltonian
systems, at the "HBVMs Homepage":

together with a number of examples, references, and a Matlab code.
Comments and suggestions are welcome.

Luigi Brugnano, Felice Iavernaro, Donato Trigiante.


From: George Anastassiou <>
Date: Sat, 20 Feb 2010 20:21:55 -0500
Subject: New monograph, Fuzzy Approximation Theory

Fuzzy Mathematics: Approximation Theory
George A. Anastassiou

This monograph belongs to the broader area of Fuzzy Mathematics and it
is the
first one in Fuzzy Approximation Theory. Chapters are self-contained
with lots
of applications and several advanced courses can be taught.The topics
are very diverse. An extensive background of Fuzziness and Fuzzy Real
is given. The author covers Fuzzy Differentiation and Integration
Theory. It
follows about Fuzzy Ostrowski inequalities. Then are presented
results on
classical algebraic and trigonometric polynomial Fuzzy Approximation.
The author
develops a complete theory of convergence with rates of Fuzzy Positive
operators to Fuzzy unit operator, the so called Fuzzy Korovkin Theory.The
related Fuzzy Global Smoothness is included. Then follows the study of
Wavelet type operators and their convergence with rates to Fuzzy unit
Similarly are discussed the Fuzzy Neural Network Operators. It follows
Fuzzy Random Korovkin approximation theory and Fuzzy Random Neural Network
approximations.The author continues with Fuzzy Korovkin approximations
in the
sense of Summability. At last are estimated in the fuzzy sense
differences of
Fuzzy Wavelet type operators.

The monograph's approach is quantitative and the main results are
given via
Fuzzy inequalities, involving Fuzzy moduli of continuity, that is Fuzzy
type inequalities.

The exposed theory is destined and expected to find applications to
aspects of Fuzziness from theoretical to practical in almost all sciences,
technology, finance and industry. Also it has its interest within Pure
Mathematics. So this monograph is suitable for researchers, graduate
and seminars of theoretical and applied mathematics, computer science,
statistics and engineering.


From: Chongjun Li <>
Date: Fri, 19 Feb 2010 22:12:46 -0500
Subject: Scientific Computing and Applications (ICSCA'10), China, Jun 2010

7th Int Conf on Scientific Computing and Applications (ICSCA¡¯10), June 2010

Seventh International Conference on Scientific Computing and Applications
(ICSCA¡¯10) will be held in Dalian University of Technology, Dalian, China
during 13-16 June 2010.

The aim of ICSCA'10 is to bring together mathematicians, scientists and
engineers working in the field of scientific computing and its applications
to solve scientific and industrially oriented problems and to provide a
forum for the participants to meet and exchange ideas of common interest in
an informal atmosphere. Papers from all branches of applied and
computational mathematics topics are welcome with accepted papers
recommended for special issues in JCAM and JICS
(Paper submission deadline extended to 15 Mar 2010).

More information is available at
General Co-Chairs:
Ren-Hong Wang (Dalian, China) and Yau Shu Wong (Alberta, Canada)
Scientific Committee:
Zhong-Ci Shi, Qun Lin, Chi-Wang Shu, Roderick S. C. Wong and Luc Wuytack
Local Organizing Committee:
Wei Wu, Bo Yu, Zhixun Su, Zhongxuan Luo and Xiuping Liu
Chong-Jun Li <> Phone: +86(0411)84708351-8310
Chun-Gang Zhu, <> Phone: +86(0411)84708351-8315


From: Max Jensen <>
Date: Fri, 19 Feb 2010 13:44:00 -0500
Subject: Numerical Analysis Summer School, University of Durham, Jul 2010

The 12th LMS/EPSRC Summer School in Computational Mathematics and Scientific
Computing will take place in the University of Durham, United Kingdom on the
25th-31st July 2010

The speakers and topics will be

Daniele Boffi: Finite Element Approximation of Eigenvalue Problems
Susanne Brenner: Finite Element Methods for Elliptic Boundary Value Problems
Peter Monk: Numerical Methods for the Time Dependent Maxwell System
Paolo Zunino: Finite Element Solution of Problems from Mathematical Biology

The purpose of the Summer Schools has always been the delivery of high
instructional courses at postgraduate level. The intended audience is a wide
one, and will include research students, academics and people from industry.
The lecturers will be encouraged to enable a person with an elementary
knowledge of a subject to attain reasonable competence in it, or with a good
initial knowledge to identify and begin work on unsolved problems.

About thirty five funded places for UK-based post-graduate students will be
supported by LMS-EPSRC. All research students registered at a UK university
will pay a registration fee of £100 (and will not be charged subsistence
costs); UK-based postdocs will be charged a registration fee of £100, plus
half the subsistence costs; all other participants will pay a
registration fee
of £250 plus full subsistence costs.

For further details (including online registration) see the web page


From: Heike Fassbender <>
Date: Sun, 21 Feb 2010 07:59:24 -0500
Subject: 2011 ILAS Linear Algebra Conference, Braunschweig, Germany, Aug

The 2011 ILAS Conference “Pure and Applied Linear Algebra: The New
will take place in Braunschweig, Germany at the Technische Universität
Braunschweig from August 22 -- 26, 2011. This conference will have a special
emphasis on young researchers, which will be reflected by predominantly
plenary speakers as well as young researchers’ minisymposia. See for more information.

Scientific Organising Committee:
Ravi Bapat (Indian Statistical Institute, New Delhi, India)
Albrecht Böttcher (TU Chemnitz, Germany)
Angelika Bunse-Gerstner (Universität Bremen, Germany)
Tobias Damm (TU Kaiserslautern, Germany)
Froilan Dopico (Universidad Carlos III de Madrid, Spain)
Shaun Fallat (University of Regina, Saskatchewan, Canada)
Heike Faßbender (TU Braunschweig, Germany, Chair)
Steve Kirkland (Hamilton Institute, Natl Univ of Ireland, Ireland)
Raphael Loewy (Technion - Israel Institute of Technology, Haifa, Israel)
Nil Mackey (Western Michigan University, Kalamazoo, USA)
Bryan Shader (University of Wyoming, Laramie, USA)
Michael Tsatsomeros (Washington State University, Pullman, USA)

Local Organising Committee:
Heike Faßbender (TU Braunschweig, Germany)
Matthias Bollhöfer (TU Braunschweig, Germany)
Peter Benner (TU Chemnitz, Germany)

Young Researchers’ Minisymposia:
Like an ordinary minisymposium, a young researchers' minisymposium will
on a specific, timely research subject. It will last two hours with four to
six talks. Two organisers from two different institutions will apply for a
young researchers' minisymposium. As all other speakers they should hold
a PhD
for no longer than 6 years and not yet hold a tenured professor's position.
>From the applications received, the programme committee will select up
to five
young researchers' minisymposia. More information on the application process
will be available soon on


From: Frank Schmidt <>
Date: Mon, 15 Feb 2010 11:34:35 -0500
Subject: Chemnitz FEM Symposium, Germany, Sep 2010

We would like to invite you and your colleagues to the

23nd Chemnitz FEM Symposium
September 27 - 29, 2010

Scientific Topics: Finite Elements, including (but not limited to)
adaptive methods, parallel implementations, high order methods.

This year special emphasis is on:
* Adaptive Methods
* Eigenvalue Approximation for Differential Operators
* Singularly Perturbed Problems

Invited Speakers:
* Kunibert Siebert (Universität Duisburg-Essen)
* Klaus Neymeyr (Universität Rostock)
* Martin Stynes (University College Cork)
* Anders Logg (University of Oslo)

Deadlines, Registration and further Information:


With best regards,
Arnd Meyer
on behalf of the organising committee


From: James Blowey <>
Date: Mon, 15 Feb 2010 13:16:16 +0000
Subject: Chair at Durham University

Durham University, UK
Department of Mathematical Sciences
Chair in Applied Mathematics
Salary: Negotiable within professorial range

Closing date: 19th April 2010

The successful candidate will be world leading and will have an
outstanding 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. He or she will be expected
to undertake and publish original research of the highest level, to
contribute to the research activities of the Applied Mathematics unit
and of the department as a whole, and to undertake teaching and
administrative duties as assigned by the Head of Department of
Mathematical Sciences.

For the job description and further particulars see

For informal enquiries contact Professor Brian Straughan


From: Mark Chaplain <>
Date: Thu, 18 Feb 2010 05:38:08 -0500
Subject: Two Positions in Computational Mathbiology at Dundee University

Lecturer/Senior Lecturer/Reader

The Division of Mathematics, University of Dundee, seeks to appoint
two suitably qualified outstanding candidates to positions in
Computational Mathematical Biology. The Division has a long-standing
history of research excellence in the areas of Mathematical Biology
and Numerical Analysis (particularly in the area of differential
equations) which it seeks to maintain and develop through these
appointments. The successful candidates will take their places in a
dynamic interdisciplinary environment and a growing Computational
Mathematical Biology group, following substantial University
investment in this area which has recently seen the addition of a new
chair and a lecturer in mathematical biology. The candidates will be
involved in the running of the new MSc degree in Computational
Mathematical Biology, commencing September 2010. There is also a
commitment to interact with colleagues in the School of Life Sciences
and develop interdisciplinary collaborative research projects in the
area of computational biology. The successful candidates should
therefore have an international research reputation in Mathematical
Biology, Computational Mathematics or Numerical Analysis of
Differential Equations and show an enthusiasm for inter-disciplinary

Informal approaches concerning this appointment may be made to:

Professor MAJ Chaplain, FRSE,
Division of Mathematics,
University of Dundee,
Dundee DD1 4HN
Tel: 01382 385369
Fax: 01382 385516

Full details at:


From: "Jorge More'" <>
Date: Tue, 16 Feb 2010 17:19:15 -0500
Subject: Predoctoral Position in Optimization at Argonne

Predoctoral Researcher
Derivative-Free Optimization of Complex Systems

The Mathematics and Computer Science (MCS) Division at Argonne
National Laboratory invites outstanding candidates to apply for a
predoctoral position focusing on research in optimization algorithms
and software for complex scientific simulations.

The successful applicant will be working with a multidisciplinary
group on basic research on algorithms and software for applications
that typically run on high-performance architectures such as Argonne's
26-teraflop Fusion cluster or the 557-teraflop IBM Blue Gene/P system.

Applicants must have recently received a B.S. or M.S. in mathematics,
computer science or a related discipline. Candidates should have a
strong background in scientific computing and numerical analysis, and
considerable experience programming with MATLAB and C/C++ or Fortran.
Experience in parallel programming (MPI) is highly desirable.

The appointment will be in the MCS Division (, which
has strong programs in computational mathematics, scientific computing
and software tools. Argonne is located in the southwestern Chicago
suburbs, offering the advantages of affordable housing, good schools,
and easy access to the cultural attractions of the city.

Applications must include a curriculum vitae with a description of the
candidate's qualifications for the position, and the names of at least
two references who can attest to the candidate's ability. Send
applications to Jorge More' ( or Stefan Wild

A U.S. Department of Energy laboratory managed by UChicago Argonne,
LLC, Argonne is an equal opportunity employer, and we value diversity
in our workforce.


From: Emma Avery <>
Date: Tue, 16 Feb 2010 16:42:25 +0000
Subject: Contents, Nonlinearity, volume 23, issue 3, March 2010


Volume 23, Issue 3, March 2010

Individual articles are free for 30 days following their publication on the
web. This issue is available at: URL:

Pages: 465--766

Baby Skyrmion chains
David Foster

Study of the noise-induced transition and the exploration of the phase
space for the Kuramoto--Sivashinsky equation using the minimum action
X Wan, X Zhou and W E

Multiscale self-affine Sierpinski carpets
Yongxin Gui and Wenxia Li

On the approximation of Lyapunov exponents and a question suggested by
Anatole Katok
Xiongping Dai

Multiple solutions for nonlinear Neumann problems with the $p$-Laplacian
and a nonsmooth crossing potential
N S Papageorgiou and G Smyrlis

Global regularity for the critical dispersive dissipative surface
quasi-geostrophic equation
Alexander Kiselev and Fedor Nazarov

Quasi-periodic solutions and stability of the equilibrium for
quasi-periodically forced planar reversible and Hamiltonian systems under
the Bruno condition
Heinz Han\ssmann and Jianguo Si

Self-similar solutions with algebraic decay for a non-local coagulation
Shangbing Ai

On 3-manifolds that support partially hyperbolic diffeomorphisms
Kamlesh Parwani

Preservation of support and positivity for solutions of degenerate
evolution equations
David M Ambrose and J Douglas Wright

Resonance bifurcations from robust homoclinic cycles
Claire M Postlethwaite and Jonathan H P Dawes

Which hole is leaking the most: a topological approach to study open
V S Afraimovich and L A Bunimovich

Non-self-similar dead-core rate for the fast diffusion equation with strong
Jong-Shenq Guo, Chia-Tung Ling and Philippe Souplet

On the determination of the nonlinearity from localized measurements in a
reaction--diffusion equation
Lionel Roques and Michel Cristofol

Non-hyperbolic ergodic measures with large support
Christian Bonatti, Lorenzo J D\' \i az and Anton Gorodetski

Trajectory and smooth attractors for Cahn--Hilliard equations with inertial
Maurizio Grasselli, Giulio Schimperna and Sergey Zelik

Numerical continuation of canard orbits in slow--fast dynamical systems
M Desroches, B Krauskopf and H M Osinga

End of NA Digest