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NA Digest, V. 20, # 9

NA Digest Tuesday, March 03, 2020 Volume 20 : Issue 9

Today's Editor:

Daniel M. Dunlavy
Sandia National Labs

Today's Topics: Subscribe, unsubscribe, change address, or for na-digest archives: http://www.netlib.org/na-digest-html/faq.html

Submissions for NA Digest:


From: Peter Schorer peteschorer@gmail.com
Date: March 02, 2020
Subject: Announcement of solution to 3x + 1 Problem

A Solution to the 3x + 1 Problem

I continue to believe I have solved this very difficult problem. In
more than two years, I have received no claims of errors in the first
two proofs of the 3x + 1 Conjecture (a proof solves the Problem) from
visitors to the paper. Recently, I discovered a third proof of the
Conjecture that is only four pages long! No claims of errors so far.

But no journal will consider the paper because of the difficulty of
the Problem, and the fact that I am not an academic mathematician (my
degree is in computer science, and most of my career has been spent as
a researcher in the computer industry).

So I am looking for a mathematician who will help me prepare the paper
for submission to a journal, and who will write the editor stating the
mathematician's belief that the paper is worthy of publication.

The paper is "A Solution to the 3x + 1 Problem", on occampress.com.

Peter Schorer, peteschorer@gmail.com

From: Jen Pestana jennifer.pestana@strath.ac.uk
Date: March 01, 2020
Subject: Solvers for Fractional Diffusion Problems, UK, Apr 2020

We are pleased to announce a Workshop on Fast Solvers for Fractional
Diffusion Problems that will take place on April 2, 2020 at the
University of Strathclyde, Glasgow, UK.

This workshop will bring together those actively working on solvers
for fractional diffusion problems, and researchers whose tools and
expertise may help to solve some of the remaining challenges in the

The invited speakers are:

Lehel Banjai (Heriot-Watt)
Iain Duff (STFC)
Stefano Massei (EPFL, Eindhoven)
Mariarosa Mazza (Insubria)
Spyros Pougkakiotis (Edinburgh)
Andy Wathen (Oxford)

Everyone is most welcome to attend. There is no fee, but we ask that
you please register at the link below for catering purposes.


From: Dirk Praetorius dirk.praetorius@asc.tuwien.ac.at
Date: March 02, 2020
Subject: Symposium Honoring Prof. Hans J. Stetter, Austria, Apr 2020

In honor of the 90th birthday of Prof. Hans J. Stetter, the Institute
for Analysis and Scientific Computing of TU Wien organizes a symposium
on Friday April 17, 2020. It will consist of two parts:

(1) in the morning, an informal Get-Together with Hans and his wife
Christine, former colleagues, and friends;

(2) in the afternoon, a mathematical colloquium on "New numerical
trends in differential equations and computer algebra". Speakers:
Prof. Wolfgang Hackbusch (MPI Leipzig, Germany), Prof. Ernst Hairer
(Univ. of Geneva, Switzerland), Prof. Martin Kreuzer (Univ. of Passau,

We have also installed an electronic guestbook, where all former
colleagues and friends are kindly asked to leave a note, independently
of whether they will be present at 17th April or not.

Homepage: https://www.asc.tuwien.ac.at/stetter90/

There are no registration fees, neither for the Get-Together nor for
the mathematical colloquium. However, we kindly ask all participants
to register via email to Ursula Schweigler before March 31, 2020.

From: FERNANDO DE TERAN VERGARA fteran@math.uc3m.es
Date: February 27, 2020
Subject: ALAMA2020-ALN2gg Meeting, Spain, Jun 2020

This is an announcement of the ALAMA2020-ALN2gg Meeting that will be
held at Universidad de Alcala (Alcala de Henares, Madrid, Spain) from
3rd to 5th June 2020.

The important dates are:

- Abstract's submission: Extended until 15 March 2020 (included)!
- Acceptance date: Until 23 March 2020
- Early bird registration: Until 12 April 2020
- Last day for registration: Until 31 May 2020

In the web page www.alama2020.com you can find all the information
related to the Meeting. We are pleased to inform that the journal
Linear and Multilinear Algebra
(https://www.tandfonline.com/toc/glma20/current) will publish a
special issue of original articles presented at the Meeting. This
special number is subject to the standard peer review process of the

This edition is celebrated in the honor of Ion Zaballa, professor at
Universidad del Pais Vasco, and of Dario A. Bini, professor at
Universita di Pisa.

From: Jens Markus Melenk melenk@tuwien.ac.at
Date: March 01, 2020
Subject: ICOSAHOM 2020, Austria, Jul 2020

The International Conference on Spectral and High Order Methods
(ICOSAHOM) will take place in Vienna, July 6-10, 2020. The deadline
for abstract submissions (in particular, for contributed talks) is
March 15. Details concerning the conference, the submission procedure
as well as deadlines for the submission of abstracts can be found on
the conference webpage at http://icosahom2020.org

The purpose of the ICOSAHOM conference series is to bring together
researchers and practitioners with an interest in the theoretical,
computational and applied aspects of high-order and spectral methods
for the solution of differential equations.

From: Sonia Cafieri sonia@recherche.enac.fr
Date: March 02, 2020
Subject: Deadline extended, EUROPT 2020, France, Jul 2020

The EUROPT 2020 Workshop, the annual event of the EUROPT Continuous
Optimization working group of EURO, will be held in Toulouse, France,
on July 1-3. It will bring together researchers from Europe and
around the globe for stimulating discussions on the latest
developments in continuous optimization.

We are pleased to announce the following deadline extensions:
-Abstract Submission: Extended to March 22, 2020
-Abstract Acceptance: Extended to April 5, 2020
-Registration deadline: Extended to May 6, 2020

Plenary Speakers:
- Claudia D'Ambrosio (CNRS, France)
- Martine Labbe (Universite Libre de Bruxelles, Belgium)
- Oliver Stein (Karlsruhe Institute of Technology, Germany)
EUROPT Fellow Lecture by Manlio Gaudioso (Universita della Calabria)

Authors are invited to submit abstracts through the EURO submission
system at http://www.euro-online.org/conf/europt2020/ Informations on
organised sessions are available at

http://europt2020.recherche.enac.fr/?page_id=19 Please contact the

organisers to contribute to the sessions.

Registration is open at


More detailed information about EUROPT 2020 are disseminated via the

website http://europt2020.recherche.enac.fr/.

From: Willy Doerfler willy.doerfler@kit.edu
Date: March 02, 2020
Subject: Summer School, Computational Photonics, Germany, Sep 2020

Summer School "Computational Photonics" at Karlsruhe Institute of
Technology, September 21-25, 2020.

In this one week summer school world leading experts from both
mathematics and theoretical physics give a concise introduction to
important concepts and recent developments in the field of
Computational Photonics. The lectures will be complemented by computer
tutorials to provide insights into the implementation and performance
of various algorithms.

Speakers: Sven Burger (ZIB Berlin), Christin David (U Jena), Andrei
Lavrinenko (DTU Denmark), Owen Miller (Yale), Lothar Nannen (TU
Vienna), Philipp Schneider (ZIB Berlin), Ole Sigmund (DTU Denmark),
Barbara Verfurth (U Augsburg).

For more details see http://www.waves.kit.edu/summerschool2020.php

Online application is open. Please note that the number of
participants is limited. There is no fee.

From: MONTAZ montaz.ali@wita.ac.za
Date: March 02, 2020
Subject: Senior Lecturer/Assoc Professor Position, NA, Optimization, Optimal Control

School of Computer Science and Applied Mathematics

Description: The School of Computer Science and Applied Mathematics
undertakes high-quality research in a wide variety of areas and is
home to several NRF rated scientists. In the domain of Applied
Mathematics the School's main research areas include symmetry methods
of differential equations, mathematical modelling, control theory,
optimization, numerical analysis and fluid mechanics. Furthermore,
research areas are in mathematics of finance, which include but not
limited to portfolio optimization, risk management, risk measurement,
stochastic processes in finance and interested rate modelling. We seek
applicants with research and teaching experience in the area of
numerical analysis or computational techniques.

Qualifications: For senior lecturer: Applicants must hold a doctorate
in numerical analysis teaching experience at a tertiary institution,
particularly numerical analysis and Optimization/Optimal Control. The
following factors will be taken into account, (i) evidence of
potential research and supervision of postgraduate students, (ii)
teaching experience, and (iii) academic citizenship. For Associate
Professor: Applicants must hold a doctorate in numerical analysis and
have a minimum of five years teaching experience at a tertiary
institution, particularly numerical analysis and Optimization/Optimal
Control. The incumbent research interest and directions beyond PhD
studies must be in the area of numerical analysis and
optimization/optimal control. Furthermore, the incumbent must have a
sustained research record and publications in recognised journal and
or scholarly books. Further, evidence of postgraduate supervision is a
necessary. The South African National Research Foundation rating is
advantageous (if available). Duties: The successful applicant will be
expected to teach numerical analysis, optimization and optimal control
at undergraduate and postgraduate levels, supervise and/or
co-supervise postgraduate students, participate in academic
administration and develop a productive research programme.

Applications: Submit a covering letter accompanied by a detailed
updated curriculum vitae, NRF rating (if available), description of
research interests, a teaching portfolio, certified copies of all
educational qualifications and identity document, and names and e-mail
addresses of three referees. To apply: External applicants are invited
to apply by registering their profile on the Wits i-Recruitment
platform located at https://irec.wits.ac.za and submitting
applications. Internal employees are invited to apply directly on
Oracle by following the path: iWits /Self Service application/"Apply
for a job". Correspondence will be entered into with short-listed
candidates only. Short-listed applicants must be available for a
personal or telephonic/Skype interview, and the presentation of a
short seminar on the proposed line of research may be required.

Closing date: 30 April 2020

From: Gerlind Plonka-Hoch plonka@math.uni-goettingen.de
Date: February 27, 2020
Subject: Junior Professor Position, Applied Mathematics in the Natural Sciences, Goettingen

The Institute of Numerical and Applied Mathematics at the University
of Goettingen invites applications for a Junior Professor Position
(W1) on Applied Mathematics in the Natural Sciences to begin at the
earliest possible date. We seek to appoint a researcher with an
excellent Ph.D. thesis and a core expertise in applied mathematics
with relations to model-based data analysis in the natural
sciences. The successful candidate is expected to have experience in
interdisciplinary research and to support a planned collaborative
research center with experimental scientists. Connections to at least
one of the research directions already represented at the institute
are desired. Teaching obligations comprise courses in the Bachelor,
Master, and PhD programs of mathematics as well as the Bachelor
program "Mathematical Data Science". The university puts emphasis on
research-oriented teaching.

Application deadline is March 22, 2020.

The full job advertisement with more important information can be
found at http://www.uni-goettingen.de/de/305402.html?cid=14883

For further information, please contact Prof. Dr. Thorsten Hohage,

From: Havard Heitlo Holm havard.heitlo.holm@sintef.no
Date: March 03, 2020
Subject: PhD Position, Numerical methods and data assimilation, SINTEF, Norway

The Computational Geosciences group at SINTEF is looking for a PhD
candidate for a new project on localized ocean forecasting. The
candidate will conduct research on high performance simulation of
simplified ocean models and data assimilation, and will be admitted to
the PhD program at the Department of Mathematical Sciences, NTNU.

For full announcement, contacts, and instructions on how to apply,
please see:


From: Badih Ghusayni badih@future-in-tech.net
Date: February 28, 2020
Subject: Contents, Mathematics and Computer Science, 15 (2)

Contents of Volume 15, no. 2 of the International Journal of
Mathematics and Computer Science (Open Access):

Abdulghani Ragaa Alharbi, Numerical investigation for the GRLW
equation using Parabolic Monge Ampere Equation.

B. O. Oyelami, S. A. Bishop, Impulsive Jump-Diffusion Models For
Pricing Securities.

Roberto Amato, A note on Pythagorean Triples.

Aqeel Ketab Al-Khafaji, On initial Coefficients Estimates for Certain
New Subclasses of Bi-Univalent Functions Defined by a Linear

Auni Aslah Mat Daud, Some issues on the mathematical modeling of
population dynamics using differential equations.

Shaymaa Amer Abdul-Kareem, Minimal Quasi Injective S-Acts.

Julian Benali, Harris Cobb, Peter Johnson, An Enumeration Problem
Arising From a Result About Arithmetic Progressions.

N. Priyobarta, Y. Rohen, M. B. Devi, Partial Ab-metric space and some
fixed point theorems.

A. Z. Ansari, F. Shujat, G. Alhendi, Ideals, Centralizers and
Symmetric Bi-derivations on prime rings.

Fuad A. Abushaheen, Hani Kawariq, Fadi Alrimawi, On p-monotone

Utsanee Leerawat, Siriporn Lapuangkham, Generalized Centralizing and
Skew-Centralizing Mappings on Rings.

H. Shelash, M. G. Mohsin, M. S. Abdulhussein, Computing the number of
subgroups and normal, cyclic, maximal, minimal and Sylow subgroups of
the direct product Group D2n xC2.

T. Manikantan, S. Ramkumar, Pseudo Symmetric Ideals and Pseudo
Symmetric Near-rings.

Koichi Arimoto, On LLL lattice basis reduction over imaginary
quadratic fields by introducing reduction parameters.

Uzoamaka A. Ezeafulukwe, Maslina Darus, Olubunmi A. Fadipe- Joseph,
The q-analogue of Sigmoid Function in the space of univalent
\lambda-Pseudo star-like Functions.

David Coronado, Domingo Quiroz, The zero sum Ramsey numbers of the
join of two graphs.

Napassanan Srisarakham, Montri Thongmoon, A new iterative method based
on Newton-Cotes formula for system of nonlinear equations.

Abdullah Yigit, Cemil Tunc, On the stability and admissibility of a
singular differential system with constant delay.

V. Jude Annie Cynthia, A. Kavitha, On 2 and 3-Rainbow Domination
Number of Circulant Graph.

Chitlada Somsup, Utsanee Leerawat, Congruences and homomorphisms on
n-ary semigroups.

Vrishab Krishna, Generalizing Abundancy Index to Gaussian Integers.

R. Memon, I. A. Memon, M. A. Panhwar, T. Rafique, A. H. Soomro,
Importance of Clinical Applications to Design and Manufacture a
Surgical Template through Computer-Aided Design.

Ahlam Fallatah, On rings and symmetric generalized biderivations.

N. A. Carella, Addendum and Corrigendum-Densities of Primes and
Primitive Roots.

Genki Shibukawa, An elliptic analogue of Fukuhara's trigonometric

From: Siberian Journal of Numerical Mathematics sibjnm@sscc.ru
Date: March 01, 2020
Subject: Contents, Siberian Journal of Numerical Mathematics, 23 (1)

CONTENTS, Siberian Journal of Numerical Mathematics

Volume 23, No. 1, 2020

For information to contributors and about subscriptions
see http://www.sscc.ru/SibJNM/

Kozelkov A.S., Lashkin S.V., Kurkin A.A., Kornev A.V., Vyalykh A.M.,
Effective implementation of the parallel SIMPLE algorithm based on
multigrid method (in Russian)

Xu C., A priori error estimates and superconvergence of splitting
positive definite mixed finite element methods for pseudo-hyperbolic
integro- differential optimal control problems (in Russian)

Levykin A.I., Novikov A.E., Novikov E.A., $(m,k)$-schemes for stiff
systems of ODEs and DAEs (in Russian)

Litvenko K.V. and Prigarin S.M., Convergence of numerical spectral
models of the sea surface undulation (in Russian)

Mastryukov A.F., The finite-difference scheme for one-dimensional
maxwell's equations (in Russian)

Mohanty R.K., Sharma S., Fourth-order numerical scheme based on
half-step non-polynomial spline approximations for 1D quasi-linear
parabolic equations (in Russian)

Paasonen V.I., Classification of difference schemes of the maximum
possible accuracy on extended symmetric stencils for the
Schr$\ddot{o}$dinger equation and the heat transfer equation (in

From: David G. Yu david.iapress@gmail.com
Date: February 29, 2020
Subject: Contents, Statistics, Optimization and Information Computing, 8 (1)

Statistics, Optimization and Information Computing (SOIC),
Volume: 8, Number: 1 March 2020

Research Articles:

1.Dariush Jamali, Mehdi Amiri, Ahad Jamalizadeh, N. Balakrishnan,
Integral stochastic ordering of the multivariate normal mean-variance
and the skew-normal scale-shape mixture models

2.Hamid Esmaeili, Fazlollah Lak, Emrah Altun, The Ristic-Balakrishnan
odd log-logistic family of distributions: Properties and Applications

3.Christophe Chesneau, Hassan S Bakouch, Muhammad Nauman Khan, A
weighted transmuted exponential distributions with environmental

4.Ali Hassan Abuzaid, Enass Abed, Abdu Atta, Esam Mahdi, An
Alternative Diagnostic Procedure for Meta-Regression

5.Vahid Fakoor, Masoud Ajami, Seyed Mahdi Amir Jahanshahi, Ali
Shariati, A Density-Based Empirical Likelihood Ratio Approach for
Goodness-of-fit Tests in Decreasing Densities

6.Renu Garg, Madhulika Dube, Hare Krishna, Estimation of Parameters
and Reliability Characteristics in Lindley Distribution Using Randomly
Censored Data

7.Mohamed Laidi, Abdelaziz Rassoul, Hamid Ould Rouis, Improved
Estimator of the Conditional Tail Expectation in the case of
heavy-tailed losses

8.Safeih Daneshi, Ahmad Nezakati, Saeid Tahmasebi, Weighted Cumulative
Residual (Past) Inaccuracy For Minimum (Maximum) of Order Statistics

9.YU. V. Kozachenko, Antonina Tegza, N. V.Troshki, The accuracy of
modeling of Gaussian stochastic process in some Orlicz spaces

10.Saba Infante, luis sanchez, Aracelis Hernandez, Stochastic models
to estimate population dynamics

11.Ivan Matsak, Mikhail Moklyachuk, On Distributions of One Class of
Random Sums and their Applications

12.Abubakar Sani Halilu, Mohammed Yusuf Waziri, Yau Balarabe Musa,
Inexact Double Step Length Method For Solving Systems Of Nonlinear

13.Nasser Sweilam, S. M. AL-Mekhlafi, A. O. Albalawi, On the
Distributed Order Fractional Multi-Strain Tuberculosis Model: a
Numerical Study

14.Ramu Dubey, Deepmala, Vishnu Narayan Mishra, Higher-order symmetric
duality in nondifferentiable multiobjective fractional programming
problem over cone contraints

15.Abdullah, Vector-valued nonuniform multiresolution analysis related
to Walsh function

16.Hadi Alizadeh Noughabi, Havva Alizadeh Noughabi, Jalil
Jarrahiferiz, Informational Energy and Entropy Applied to Testing

17.Farid shayesteh, Reihaneh Kardehi Moghaddam, Improving firefly-
based multi-objective optimization based on attraction law and
crowding distance

18.Zubair Khan, Syed Shakaib Irfan, M. Firdosh Khan, P. Shukla, An
itertive algorithm with error terms for solving a system of implicit
n- variational inclusions

19.Masoumeh Kheirkhahzadeh, Morteza Analoui, A Consensus Clustering
Method for Clustering Social Networks

20.Hamed Fazlollahtabar, Minoo Talebi Ashoori, Business Analytics
using Dynamic Pricing based on Customer Entry-Exit Rates Tradeoff

21.Mohamed Aliane, Nacima Moussouni, Mohand Bentobache, Optimal
control of a rectilinear motion of a rocket

22.Sergey S Yulin, Irina N Palamar, Probability Model Based on Cluster
Analysis to Classify Sequences of Observations for Small Training Sets

23.Hamid Esmaeili, Fazlollah Lak, Morad Alizadeh, Mohammad esmail
Dehghan monfared,The Alpha-Beta Skew Logistic Distribution: Properties
and Applications

24.Mohammad M Islam, Erik L Heiny, A Robust Statistical method to
Estimate the Intervention Effect with Longitudinal Data

End of Digest