[External Email]

Subject: NA Digest, V. 20, # 9

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

Today's Editor:

        Daniel M. Dunlavy
        Sandia National Labs
        [log in to unmask]

Today's Topics:

        Announcement of solution to 3x + 1 Problem
        Solvers for Fractional Diffusion Problems, UK, Apr 2020
        Symposium Honoring Prof. Hans J. Stetter, Austria, Apr 2020
        ALAMA2020-ALN2gg Meeting, Spain, Jun 2020
         ICOSAHOM 2020, Austria, Jul 2020
        Deadline extended, EUROPT 2020, France, Jul 2020
        Summer School, Computational Photonics, Germany, Sep 2020
        Senior Lecturer/Assoc Professor Position, NA, Optimization, Optimal Control
        Junior Professor Position, Applied Mathematics in the Natural Sciences, Goettingen
        PhD Position, Numerical methods and data assimilation, SINTEF, Norway
        Contents, Mathematics and Computer Science, 15 (2)
        Contents, Siberian Journal of Numerical Mathematics, 23 (1)
        Contents, Statistics, Optimization and Information Computing, 8 (1)

Subscribe, unsubscribe, change address, or for na-digest archives:

Submissions for NA Digest:


From: Peter Schorer [log in to unmask]
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

Peter Schorer, [log in to unmask]


From: Jen Pestana [log in to unmask]
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 [log in to unmask]
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.


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 [log in to unmask]
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 you can find all the information

related to the Meeting. We are pleased to inform that the journal

Linear and Multilinear Algebra

( 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 [log in to unmask]
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

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 [log in to unmask]
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 Informations on

organised sessions are available at Please contact the

organisers to contribute to the sessions.

Registration is open at

More detailed information about EUROPT 2020 are disseminated via the



From: Willy Doerfler [log in to unmask]
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

Online application is open. Please note that the number of

participants is limited. There is no fee.


From: MONTAZ [log in to unmask]
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 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 [log in to unmask]
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

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

[log in to unmask]


From: Havard Heitlo Holm [log in to unmask]
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 [log in to unmask]
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 [log in to unmask]
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


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 [log in to unmask]
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