NA Digest, V. 19, # 30

NA Digest Sunday, August 04, 2019 Volume 19 : Issue 30


Today's Editor:

Daniel M. Dunlavy
Sandia National Labs
dmdunla@sandia.gov

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From: Juan José Torrens jjtorrens@unavarra.es
Date: August 04, 2019
Subject: Rémi Arcangéli (1928 - 2019)


Sorrowfully we let you know that Dr. Remi Arcangeli passed away in July
at the age of 91 years.

Remi started his academic career in Toulouse, where he studied
Mathematics, he completed his these de 3eme cycle in 1963 and later,
in 1974, under the supervision of Marc Atteia, he got his these
d'Etat. He moved to the University of Pau in 1973, where he hold
several positions up to his retirement, as 1st class professor, in 1993.

Remi's early contributions dealt with several questions in ordinary
and partial differential equations, ill-posed problems, where he
contributed the discrepancy principle named after him, and operator
theory. The core of his work, however, lay in the fields of numerical
analysis and approximation theory, mainly polynomial and rational
interpolation, spline functions, scattered data fitting, sampling
inequalities, error bounds, and finite elements.

Mathematical research was always Remi's passion, which he knew how to
pass on his colleagues and doctorate students. Even after his
retirement to Arbas, the French Pyrenean small village where he was
born, Remi remained very active and wrote a book and several papers.

Remi was a great person, who excelled in helpfulness, integrity and
sound advices. He will be sadly missed by his colleagues and friends,
which would surely want to join us in expressing our most profound
condolences to his wife Simone, sons Jean-Paul, Pierre-Noel and
Francois, and grandchildren. We shall remember him with affection and
great gratitude.

Maria Cruz Lopez de Silanes and Juan Jose Torrens



From: Tobias Breiten tobias.breiten@uni-graz.at
Date: August 02, 2019
Subject: Model Reduction of Complex Dynamical Systems, Austria, Aug 2019


Subject: 4th Workshop on "Model Reduction of Complex Dynamical

Systems" - Scientific Program & Poster session

A preliminary schedule as well as the book of abstracts for the 4th
Workshop on Model Reduction of Complex Dynamical Systems (MODRED 2019)
is now available under https://imsc.uni-graz.at/modred2019/index.html

There will be an additional poster session focusing on model order
reduction and related software. All posters will be accessible during
the coffee breaks of the conference.

The workshop will take place from August 28-30, 2019 in Graz, Austria.
The conference continues a series of model reduction conferences
previously organized in Berlin (2010), Magdeburg (2013), and Odense
(2017). Scientific topics include computational methods for model
order reduction of dynamical systems, data-driven methods, digital
twinning, model reduction methods in applications and surrogate
modelling for design and optimization.

Proceedings: A special issue on model reduction of complex dynamical
systems will appear in the Springer International Series of Numerical
Mathematics.



From: Friederike Hellwig hellwigf@math.hu-berlin.de
Date: August 02, 2019
Subject: Minimum Residual & Least-Squares Finite Element Methods, Germany, Sep 2019


You are cordially invited to participate at the workshop "Minimum
Residual & Least-Squares Finite Element Methods" from September 16 to
September 18, 2019. The workshop takes place at the
Humboldt-Universitat zu Berlin.

The speakers include Pavel Bochev, Wolfgang Dahmen, Leszek Demkowicz,
Marc Gerritsma, Jay Gopalakrishnan, Norber Heuer, Gerhard Starke, and
Rob Stevenson.

The program and further information can be found on the website
https://hu.berlin/dpgls2019

Speakers are by invitation only. Visitors are welcome to attend the
lectures and to present a poster. Subscribe as visitor or course
member by sending an e-mail with your first name, last name, and
affiliation and the subject to the organizers
dpgls2019@math.hu-berlin.de.



From: Felix Kwok felix_kwok@hkbu.edu.hk
Date: August 03, 2019
Subject: Domain Decomposition Methods, Hong Kong, China, Dec 2019


DD26: Financial support available for US participants

The 26th International Conference on Domain Decomposition Methods
(DD26) will be held at the Chinese University of Hong Kong (CUHK) from
December 2 to 6, 2019. The purpose of the conference is to bring
together mathematicians, computational scientists and engineers who
work in the main themes of Domain Decomposition, including
theoretical, algorithmic and implementation aspects of domain
decomposition methods, solvers for multiphysics problems,
parallel-in-time methods, multigrid and multilevel methods, fast
solvers and preconditioning, and applications of such methods in
physics and engineering. A list of accepted minisymposia can be found
on the conference website at

https://www.math.cuhk.edu.hk/conference/dd26/?Conference-Home

We are also inviting contributed talk and poster proposals. If you
would like to give a contributed talk or present a poster, please send
your name, institution, talk/poster title and abstract to
dd26@math.cuhk.edu.hk. The deadline is August 15, 2019 for contributed
talks, and September 15, 2019 for posters.

Applications are being accepted for travel support for young US
participants, graduate students, and recent PhD recipients for
DD26. This support is funded by the National Science Foundation. To
be considered for funding, please email a cover letter, including a
statement about why you want to participate, along with a CV to
dd26@math.cuhk.edu.hk. Please arrange for one letter of recommendation
to be sent separately to the same email address. Deadline for
submissions: September 30, 2019. For more details about NSF support
for US-based participants, please contact Amy Stover at azs5@psu.edu.



From: Takeshi Fukaya fukaya@iic.hokudai.ac.jp
Date: July 29, 2019
Subject: Extension, HPC Asia, Japan, Jan 2020


HPC Asia 2020 - Call for Papers: paper submission due has been
extended.

HPC Asia: International Conference on High Performance Computing in
Asia-Pacific Region, January 15-17, 2020, Fukuoka, Japan

High performance computing is a key technology to solve large problems
in science, engineering, and business by utilizing computing power
which has been evolving to the future. HPC Asia, which is an
international conference series on HPC technologies in Asia Pacific
region, and was held in the past several times in several countries in
Asia regional site to discuss the issues on high performance computing
and to exchange information of research and development results.
Following the success in 2018 and 2019, the International Conference
on High Performance Computing in Asia-Pacific Region, or HPC Asia 2020
is organized in order to exchange ideas, case studies, and research
results related to all issues of high performance computing.

Important Dates:
- Abstract submissions due: August 26, 2019 (AoE, Anywhere on Earth,
UTC-12), extended, no further extension.
- Paper submissions due: August 31, 2019 (AoE, Anywhere on Earth,
UTC-12), extended, no further extension.
- Notification of Acceptance: October 14, 2019
- Camera-ready papers due: November 1, 2019
- Conference: January 15-17, 2020

Conference Web page: http://sighpc.ipsj.or.jp/HPCAsia2020/
E-mail contact: hpcasia2020@sighpc.ipsj.or.jp


From: Stefan Ratschan stefan.ratschan@cs.cas.cz
Date: August 02, 2019
Subject: Tenure Track Researcher Positions, Czech Academy of Sciences, Prague


The Institute of Computer Sciences of the Czech Academy of Sciences
(ICS CAS), Prague, invites applications for tenure track positions in
Computer Science and in Artificial Intelligence. Numerical Analysis is
definitely in scope.

For more details see:
http://www.ustavinformatiky.cz/job-offer/Tenure-Track-Positions-In-Computer-Science-
AI/en



From: Jairo Rocha de Faria jairo@ci.ufpb.br
Date: July 30, 2019
Subject: Visiting Professor Position, Inverse Problems, Federal Univ of Paraíba, Brazil


The Federal University of Paraiba, Brazil, through the Postgraduate's
Pro-rectory, publishes today, July 22, 2019, Call to invite professors
interested to the selection of international visiting professors to
teach, research and other activities of academic-scientific profile at
the UFPB Postgraduate Programs (Master and Ph.D. level). For this
call 55 (fifty-five) vacancies will be offered for professors with a
Ph.D. and at least two (2) years of academic
experience:http://www.prpg.ufpb.br/prpg/contents/destaques/ufpb-invite-
national-and-international-visiting-professors-to-the-selection-process?
fbclid=IwAR1sNWhRx829QnkOjiHbQT- XhBVWg8dYkspyy7XJto5ghhN6_nZvrYJ3XtA)
In particular for the Postgraduate Program of Mathematic and
Computational Modelling. To participate in the selection process, the
candidate must present the following documents:

1. Application form (available online in August
http://www.prpg.ufpb.br/prpg);
2. Curriculum vitae and diplomas (copies of undergraduate, master,
and Ph.D.);
3. Copy of personal identification document (Passport or, for
candidates from the Mercosur Bloc, National ID Card);
4. Work and research plan (Inverse Problems);

CURRICULUM VITAE
1. Personal information and e-mail;
2. Degrees and academic affiliation;
3. Professional experience in academic, scientific and/or technical
fields since obtainment of Ph.D.;
4. Relevant publications;
5. Awards.

Inscription: From 03 to 12 August - e-mail: boness@ci.ufpb.br



From: Youzuo Lin ylin@lanl.gov
Date: July 30, 2019
Subject: Postdoc Position, Deep Learning for Computational Imaging, LANL


We have an immediate opening for a creative and resourceful
postdoctoral researcher with strong computational skills and
experience in imaging inverse problems and deep learning methods. We
are seeking a highly-motivated individual to join a multidisciplinary
research team consisting of machine learning scientists, computational
scientists and domain experts to conduct cutting-edge machine learning
research for computational imaging, with application to the
subsurface, material and other scientific domains.

Minimum Job Requirements:
- Strong computational science and numerical optimization skills, in
particular, computational imaging and inverse problems
- Strong deep learning skills and practical experience in various
neural network architectures (DNN, CNN, RNN/LSTM, GAN or other auto
encoder)
- Practical experience with machine learning packages such as PyTorch,
TensorFlow, Keras, etc.
- Code development and computational experience in using
high-performance parallel computing resources
- Solid publication record in high-impact journals, top-tier machine
learning, and related conferences
- Excellent communication, writing, and oral presentation skills, and
- Strong programming skills, in Python in particular.

Desired Skills:
- Demonstrated ability to work creatively and independently and in a
team environment.
- Ability to obtain DOE Q clearance.

Education: A Ph.D. in Computer Sciences, Applied Math, Computational
Sciences, Electrical Engineering or closely related field is required.
The candidate must have completed all Ph.D. requirements by
commencement of the appointment and be within 5 years of completion of
the Ph.D.

To apply, please search for IRC75107 under jobs.lanl.gov

Additional information about this position can be obtained by
contacting Dr. Youzuo Lin (ylin@lanl.gov) and Dr. Brendt Wohlberg
(brendt@lanl.gov).



From: Luca Heltai luca.heltai@sissa.it
Date: August 01, 2019
Subject: Postdoc Position, International School for Advanced Studies, Italy


Title of the position: Adaptive methods for solving multi-physics
problems in nanoelectronic devices.

The International School for Advanced Studies, Trieste, has an opening
in the applied mathematics laboratory group (mathLab) for a
Postdoctoral Scholar.

The candidate will work on
- Modeling and numerical simulation of nanometric electronic devices
- Modeling of electrical properties of materials, including structural
defects and interfaces, providing a link between ab-initio
simulation software and traditional technological CAD software used
in the semiconductor industry.
- Adaptive methods for the numerical simulation of the potential /
temperature of the device and of the charge continuity and
drift-diffusion equations.

The project is developed in close contact with a software company
working in the field of semiconductor device modeling.

Additional information:

https://www.sissa.it/bandi/selezione-pubblica-titoli-conferimento-di-n-1-assegno-di-
ricerca-area-matematica-ref-prof-2

Deadline for the application: 30 August 2019
First available date for position start: 16 September 2019
Online application: https://pica.cineca.it/sissa/ar-fe-mate-38-2019


From: Marie-Therese Wolfram mt.wolfram@ricam.oeaw.ac.at
Date: July 29, 2019
Subject: Postdoc Position, Mathematical Modeling and Simulation, RICAM


The New Frontiers Group on 'Mathematical modeling and simulation of
crowded transport in the life and social sciences' at the Johann Radon
Institute for Computational and Applied Mathematics (RICAM,
http://www.ricam.oeaw.ac.at/ ) is seeking for a PostDoc with a strong
background in applied partial differential equations. The successful
candidate will join the team of Dr. Marie-Therese Wolfram in Vienna,
which is working on analytic and computational aspects of crowded
transport. The research focus will be adjusted to the candidate\371s
interests and should include collaborative projects within the working
group. We are looking for talented and independent young researcher
with an excellent background on the analytical and/or computational
methods for optimal transport or mean field games. A PhD in applied
mathematics is mandatory. A strong record of relevant publications in
international peer-reviewed journals in applied mathematics is
essential. The position is available from September 1, 2019 or soon
thereafter, and will be offered as a fixed-term contract for an
initial period of one year (with a possible extension to a maximum of
two years). The monthly gross salary is based on the salary scale of
the FWF and will be EUR 3.711,10 (14 times per year).

Applicants should send the following information: motivation letter;
research statement; curriculum vitae; PhD certificate; publication
list; and 2 refererence letters in a single pdf file to
mt.wolfram@ricam.oeaw.ac.at until August 18th, 2019.


From: Sébastien Boyaval sebastien.boyaval@enpc.fr
Date: August 02, 2019
Subject: Postdoc Position, Non-Newtonian Shallow-water Flow Simulation, France


A postdoc position is available at Ecole des Ponts (Laboratoire
d'hydraulique Saint-Venant) close to Paris, France.

The goal is to simulate new non-Newtonian shallow-water models to
predict the transport of sediments in rivers.

It is a project common with EDF, see details in
https://www.saint-venant-lab.fr/viedulabo/recrutements/shallow-water-flows-of-non-
newtonian-fluids



From: Christoph Ortner c.ortner@warwick.ac.uk
Date: August 01, 2019
Subject: Postdoc Position, Warwick Univ


The advertised post (tiny.cc/6z7laz) is intended to develop the
theoretical/mathematical foundations of the Leverhulme Trust funded
project "The Nature of Interatomic Forces in Metallic Systems", within
one of two possible directions:
(1) Developing an approximation theoretic approach to constructing
interatomic potentials and hamiltonians. This theme will require
expertise in analysis, approximation theory and machine learning.
(2) Connecting randomness and localisation to characterise the
interaction range of interatomic forces. This theme will require
expertise in analysis, probability theory and random matrices.

For more details, please see tiny.cc/6z7laz or the full link
below. Informal enquiries to c.ortner@warwick.ac.uk are welcome.

Closing Date: 26 August 2019.
Start Date: As soon as possible.

https://atsv7.wcn.co.uk/search_engine/jobs.cgi?
owner=5062452&ownertype=fair&jcode=1812790&vt_template=1457&adminview=1



From: J. Lu jianlu1979@163.com
Date: July 31, 2019
Subject: Postdoc Positions, Computer Vision/Optimization, China


Postdoc Positions in Shenzhen University, China
Location: Shenzhen, China
Job Type: Full-Time
Duration: 2 years
Number of Position: 4 Positions
Salary: about 480,000 RMB (about 70,000 US dollars) per year for those
who have obtained Ph.D. degrees from universities ranked 200 in the
world (e.g., Times Higher Education World University Ranking, QS,
USNEWS).
Closing Date: August 15, 2019.

Description: We are looking for Postdoctoral Researchers in
Image/Video Processing/Analysis,Mathematical Imaging, Computer Vision,
Optimization, Inverse Problems, Wavelet analysis, etc.

We have no teaching tasks and check in / check out policy for
Postdoctoral Researchers.

Promotors:
- Prof. Jian Lu (Shenzhen Key Laboratory of Advanced Machine Learning
and Applications, Shenzhen University)
- Prof. Charles Chui (Editors-in-Chief of ACHA)

Those who are interested please send their C.V. to Prof. Dr. Jian Lu,
e-mail: jianlu@szu.edu.cn; jianlu1979@163.com



From: IMA Journal of Numerical Analysis charlotte.parr@oup.com
Date: August 01, 2019
Subject: Contents, IMA Journal of Numerical Analysis, 39 (3)


IMA Journal of Numerical Analysis
Links to all articles in this issue are available online at:
https://academic.oup.com/imajna/issue/39/3

Two-scale method for the Monge-Ampere equation: pointwise error
estimates, R H Nochetto, D Ntogkas, and W Zhang

A stroboscopic averaging algorithm for highly oscillatory delay
problems, J M Sanz-Serna and Beibei Zhu

Runge-Kutta convolution coercivity and its use for time-dependent
boundary integral equations, Lehel Banjai and Christian Lubich

Equilibrated flux a posteriori error estimates in L2 (H1)-norms for
high- order discretizations of parabolic problems, Alexandre Ern, Iain
Smears, and Martin Vohralik

An efficient algorithm for simulating ensembles of parameterized flow
problems, Max Gunzburger, Nan Jiang, and Zhu Wang

Unified error analysis for nonconforming space discretizations of
wave- type equations, David Hipp, Marlis Hochbruck, and Christian
Stohrer

Random permutations fix a worst case for cyclic coordinate descent,
Ching-pei Lee and Stephen J Wright

A semismooth Newton method with analytical path-following for the H1-
projection onto the Gibbs simplex, L Adam, M Hintermuller, and T M
Surowiec

An inexact regularized Newton framework with a worst-case iteration
complexity of O(epsilon-3/2) for nonconvex optimization, Frank E
Curtis, Daniel P Robinson, and Mohammadreza Samadi

Schur complement preconditioners for multiple saddle point problems of
block tridiagonal form with application to optimization problems,
Jarle Sogn and Walter Zulehner

Optimal sampling rates for approximating analytic functions from
pointwise samples, Ben Adcock, Rodrigo B Platte, and Alexei Shadrin

Approximation of minimal surfaces with free boundaries: convergence
results, Tristan Jenschke

Solving polynomial systems via homotopy continuation and monodromy,
Timothy Duff, Cvetelina Hill, Anders Jensen, Kisun Lee, Anton Leykin,
and Jeff Sommars

Two low-order nonconforming finite element methods for the Stokes flow
in three dimensions, Jun Hu and Mira Schedensack

Finite element approximations of the nonhomogeneous fractional
Dirichlet problem, Gabriel Acosta, Juan Pablo Borthagaray, and Norbert
Heuer

Analysis of an adaptive HDG method for the Brinkman problem, Rodolfo
Araya, Manuel Solano, and Patrick Vega

Numerical analysis of the energy-dependent radiative transfer
equation, Kenneth Czuprynski, Joseph Eichholz, and Weimin Han

Quasi-Monte Carlo integration with product weights for elliptic PDEs
with log-normal coefficients, Yoshihito Kazashi

Error estimates of finite element method for semilinear stochastic
strongly damped wave equation, Ruisheng Qi and Xiaojie Wang



From: Robert McLachlan r.mclachlan@massey.ac.nz
Date: July 30, 2019
Subject: Contents, Journal of Computational Dynamics, 6


The Journal of Computational Dynamics is a platinum OA journal
published by the American Institute of Mathematical Sciences.
https://www.aimsciences.org/journal/2158-2491

Werner Bauer & Francois Gay-Balmaz, Towards a geometric variational
discretization of compressible fluids: The rotating shallow water
equations

Jing Li & Panos Stinis, Mori-Zwanzig reduced models for uncertainty
quantification

Lee DeVille, Nicole Riemer & Matthew West, Convergence of a
generalized Weighted Flow Algorithm for stochastic particle
coagulation

Shrihari Sridharan & Atma Ram Tiwari, The dependence of Lyapunov
exponents of polynomials on their coefficients

Robert I McLachlan, Christian Offen & Benjamin K Tapley, Symplectic
integration of PDEs using Clebsch variables



From: Claude Brezinski claude.brezinski@univ-lille.fr
Date: August 04, 2019
Subject: Contents, Numerical Algorithms, 81 (4)


Table of Contents
Numerical Algorithms, Vol. 81, No. 4

Special Issue: Auckland Numerical Ordinary Differential Equations
Conference (ANODE 2018), February 19-23, 2018, Auckland, New Zealand

Preface, Luigi Brugnano, Zdzislaw Jackiewicz, Helmut Podhaisky, Yajuan
Sun, Caren Tischendorf

Spectrally accurate space-time solution of Hamiltonian PDEs, Luigi
Brugnano, Felice Iavernaro, Juan I. Montijano, Luis Randez

Global error bounds of one-stage extended RKN integrators for
semilinear wave equations, Bin Wang, Xinyuan Wu

Symplectic integration of boundary value problems, Robert
I. McLachlan, Christian Offen

A new family of A-stable Runge-Kutta methods with equation-dependent
coefficients for stiff problems, Yonglei Fang, Yanping Yang, Xiong
You, Bin Wang

Optimal residuals and the Dahlquist test problem, Robert M. Corless,
C. Yalcin Kaya, Robert H. C. Moir

Explicit Gautschi-type integrators for nonlinear multi-frequency
oscillatory second-order initial value problems, Wei Shi, Xinyuan Wu

Symplectic integrators with adaptive time step applied to runaway
electron dynamics, Yanyan Shi, Yajuan Sun, Yang He, Hong Qin, Jian Liu

Trees and B-series, J.C. Butcher

Waveform relaxation: a convergence criterion for
differential-algebraic equations, Jonas Pade, Caren Tischendorf

Transformed implicit-explicit DIMSIMs with strong stability preserving
explicit part, G. Izzo, Z. Jackiewicz

Krylov projection methods for linear Hamiltonian systems, Lu Li, Elena
Celledoni

Energy-preserving trigonometrically fitted continuous stage
Runge-Kutta-Nystrom methods for oscillatory Hamiltonian systems,
Jiyong Li, Yachao Gao

Variable order and stepsize in general linear methods, Saghir Ahmad,
J.C. Butcher, Winston L. Sweatman

A novel approach to rigid spheroid models in viscous flows using
operator splitting methods, Benjamin Tapley, Elena Celledoni, Brynjulf
Owren, Helge I. Andersson

Gating-enhanced IMEX splitting methods for cardiac monodomain
simulation, Kevin R. Green, Raymond J. Spiteri

The performance of the N-body integrator SSS, P.W. Sharp

On the existence of three-stage third-order modified
Patankar-Runge-Kutta schemes, Stefan Kopecz, Andreas Meister

Symplectic simulation of dark solitons motion for nonlinear
Schrodinger equation, Beibei Zhu, Yifa Tang, Ruili Zhang, Yihao Zhang

Error control Gaussian collocation software for boundary value ODEs
and 1D time-dependent PDEs, Mark Adams, Connor Tannahill, Paul Muir

Energy-preserving algorithm for gyrocenter dynamics of charged
particles, Ruili Zhang, Jian Liu, Hong Qin, Yifa Tang

Split-step cubic B-spline collocation methods for nonlinear
Schroedinger equations in one, two, and three dimensions with Neumann
boundary condition,s Shanshan Wang, Luming Zhang


End of Digest
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