From: "David S. Bindel" To: NA-DIGEST-L Subject: NA Digest, V. 26, # 27 Date: Fri, 3 Jul 2026 13:43:41 +0000 NA Digest Friday, July 03, 2026 Volume 26 : Issue 27 Today's Editor:       David S. Bindel       Cornell University       bindel@cornell.edu Today's Topics:       Passing of Nick Maclaren       New software: quaternion-monoid-algebra 0.3.0       New Book, Numerical Solutions to Partial Differential Equations with Finite Difference Methods       Fourth Workshop on Soliton Theory, Nonlinear Dynamics and Machine Learning, 24-29 Aug 2026       Reminder early registration deadline DRWAA26, 31 Aug-04 Sep 2026       Workshop on structured optimization, 29 Sep-1 Oct 2026       First UK Conference on Inverse Problems, University of Leeds, 22-23 March 2027       Head of a Research Group (f/m/d) (Ref. 26/16) at the Weierstrass Institute, Germany       W3 Professorship in Mathematical Modelling, Clausthal University of Technology, Germany       Tenure-track Lerheden Assistant Professor position in Applied Mathematics at KTH, Sweden       Open position for a specialist in sparse linear algebra, MOSEK, Denmark or world-wide       Post Doc Position in Brazil       Postdoc Position in mathematical optimization at University of Graz, Austria       Two Postdoctoral Research Positions (f/m/d) in mathematical statistics, WIAS, Germany       PhD fellowship, PharMetrX program, Potsdam/Berlin, Germany       Contents, Bulletin of Computational Applied Mathematics, Vol.13, N1 See this issue of NA Digest on the web at:       https://na-digest.coecis.cornell.edu/na-digest-html/26/v26n27.html Submissions, FAQs, and archives:       https://na-digest.coecis.cornell.edu/ ------------------------------------------------------- From: Damian McGuckin damianm@esi.com.au Date: June 29, 2026 Subject: Passing of Nick Maclaren I sadly/belatedly report that Nick (Nicholas Malcolm) Maclaren, formerly at the University of Cambridge, died just before Christmas 2025 aged 77. A mathematician and statistician, Nick had worked in computing all his career, starting in 1966 on a Mercury Meteor. In the latter half of his career, this was dominated by high-performance and scientific computing, including the development of parallelism and language standards and some open source projects. He taught practical software engineering to a very broad spectrum of scientists including engineers and mathematicians at the University of Cambridge, continuing that post-retirement through the University of Warwick. Some talks by those at his funeral remembered that Nick wanted there to be a rigorous theoretical foundation to our parallel programming. He hated the possibility of a code working almost always but failing sometimes. This is all too easy when you have parts of the calculation being done on independent processors, with each needing to look at another's data from time to time to be sure that the other processor has had time to do the work needed. Nick also made contributions to the NAG libraries in many ways, perhaps the most significant of which was his testing expertise to ensure pseudo-random number generators were portable to vastly different machine architectures. He was on the Fortran panel for two decades and was actively involved in ISO/IEC JTC1 SC22 programming language standardization activities: WG5 (Fortran) from 2008 to 2016 as well as WG14 (C), WG21 (C++), WG15 (POSIX) and WG2 (Pascal) before that. John Reid worked with Nick on WG5 and he particularly noted that Nick's insights on parallel programming were very helpful when coarrays were being finalized Some of us interacted with Nick in the context of the IEEE 754 standard, a common thread of interest in those working groups. Some of the insightful improvements to IEEE 754 he suggested decades ago have finally started to gain real traction just at the time of his passing. Bjarne Stroustrup, who in Principles and Practice in C++ (2nd edition), thanked Nick for the many detailed comments on the student exercises in the first edition of his book, on hearing of his passing said that "Nick was a great guy. We talked about much, mostly numerics where he was an expert. He even wrote and taught a C++ course." ------------------------------------------------------- From: Cody Churchwell rockvillecodymaryland@gmail.com Date: July 02, 2026 Subject: New software: quaternion-monoid-algebra 0.3.0 quaternion-monoid-algebra is an MIT-licensed Python library defining a compositional algebra (a monoid: closed, associative, two-sided identity) over fixed-width packets carrying a unit quaternion, small symbolic fields, and a scale factor. Version 0.3.0 adds formal topology notes with machine-checked proofs: composing a configuration with a common packet preserves Vietoris-Rips persistence diagrams exactly (unit-quaternion translations are isometries of the projective metric), and iterated composition is an isometric development with a subadditive window bound. A vectorized NumPy batch API composes ~3.6M packets/sec on one CPU core using an O(log N)-depth tree reduction; a CuPy GPU port is included. Validated on the TUM RGB-D and EuRoC MAV ground-truth motion streams. Applications: composable agent state evolution, multi-source state composition, and algebraic audit-chain verification. Code: https://github.com/consigcody94/quaternion-monoid-algebra Archive: https://doi.org/10.5281/zenodo.20301069 Feedback and prior-art pointers are very welcome. Cody Churchwell, Independent Researcher ------------------------------------------------------- From: Zhi-Zhong Sun zzsun@seu.edu.cn Date: June 26, 2026 Subject: New Book, Numerical Solutions to Partial Differential Equations with Finite Difference Methods Numerical Solutions to Partial Differential Equations with Finite Difference Methods Finite difference methods remain a fundamental tool for the numerical solution of partial differential equations in science and engineering. This book presents a systematic introduction to finite difference schemes for classical linear and nonlinear evolution equations, fractional PDEs, and related boundary value problems, with detailed attention to stability, convergence, and energy analysis. Topics include two-point boundary value problems, elliptic, parabolic, and hyperbolic equations, alternating direction implicit methods for high-dimensional evolution equations, fractional diffusion-wave equations, the Schrodinger equation, Burgers' equation, and the Korteweg-de Vries equation. Numerical examples are provided to illustrate the algorithms and verify the theoretical results. 2026 / XIV+463 pages / Hardcover / 978-981-95-5562-8 / Springer Asia Pacific Mathematics Series, Vol. 9 / Springer Singapore Bookstore link: https://link.springer.com/book/10.1007/978-981-95-5563-5 ------------------------------------------------------- From: Stoyan Mishev stoyan.mishev@iaps.institute Date: June 27, 2026 Subject: Fourth Workshop on Soliton Theory, Nonlinear Dynamics and Machine Learning, 24-29 Aug 2026 TThe Fourth Hybrid Workshop on Soliton Theory, Nonlinear Dynamics and Machine Learning gathers scientists and specialists from 24th to 29th of August, 2026 at the Black Sea in the town Tsarevo, Bulgaria. The discussed topics are in the following fields: - non-linear dynamics; - machine learning; - differential equations; - control theory; - theoretical and mathematical physics. The meetings website can be reached at https://indico.iaps.institute/e/solitons-nonlinear-machine-learning-2026. The workshop proceedings will be published in the Journal of Physics: Conference Series. The reports can be presented both on-site in Tsarevo or online. Please reach out to the organizers for more information. ------------------------------------------------------- From: Giacomo Elefante giacomo.elefante@usi.ch Date: June 30, 2026 Subject: Reminder early registration deadline DRWAA26, 31 Aug-04 Sep 2026 Dear Colleagues, This is a gentle reminder. The registration for the Dolomites Research Week on Approximation and Applications (DRWAA26) is open. The deadline for regular registration is July 6th. DRWAA26 is scheduled for August 31th - September 4th 2026 in Bressanone (BZ), Italy. You can find information and updates at the following link https://sites.google.com/view/drwaa26 Confirmed plenary speakers: - Prof. Mariarosa Mazza (Università di Roma Tor Vergata, IT) - Prof. Michael Multerer (Università della Svizzera Italiana, CH) Planned parallel sessions/working groups: - RBF and kernel-based methods (organizers: B. Degli Esposti and M. Rot) - Computational Imaging: Theory, Algorithms, and Learning (organizers: T. Bubba, W. Erb, C. Razzetta) A Poster Session will take place on September 3th (organizers: G. Elefante and G. Santin) Please refer to the website for future updates on the scientific program. For any information, feel free to contact us ---> drwaa26@math.unipd.it Best regards, the Organizing Committee ------------------------------------------------------- From: Elisa Riccietti elisa.riccietti@ens-lyon.fr Date: July 02, 2026 Subject: Workshop on structured optimization, 29 Sep-1 Oct 2026 Dear colleagues, We are pleased to announce the workshop STOP 2026 -- STructured OPtimization for Inverse and Learning Problems, which will take place at ENS de Lyon (France) from 29th September to 1st October 2026. The workshop aims to bring together researchers working on structured and large-scale optimization, with a particular focus on the development of efficient algorithms exploiting the structure of the problems and their applications to inverse problems, imaging, scientific machine learning, and related areas. Topics include, among others: Inverse problems Multilevel optimization Stochastic optimization Scientific machine learning Matrix decompositions Reduced- and mixed-precision algorithms Participation is free of charge (registration required). Submission are accepted until the 1st of September. Prior to the workshop, on 28th September, Elisa Riccietti will give her Habilitation (HdR) defence entitled "Exploiting Hierarchical Structures in Numerical Optimization". More information, including the list of invited speakers and practical details for the workshop, is available on the conference website: https://stop.sciencesconf.org/ We would be grateful if you could share this announcement with colleagues and students who might be interested. We hope to welcome many of you in Lyon! Best regards, The STOP 2026 Organizing Committee ------------------------------------------------------- From: Daniel Lesnic D.Lesnic@leeds.ac.uk Date: June 27, 2026 Subject: First UK Conference on Inverse Problems, University of Leeds, 22-23 March 2027 The main aim of the Conference is for all researchers in the UK (both senior academics, research staff and postgraduate students) and elsewhere, who are working on Inverse Problems to meet in an informal way to present their current research work. It is intended that Conference Proceedings will be published (with ISB number) and distributed at the conference. Only the papers presented at the conference by registered authors will be included in the conference proceedings. There is also the option of conference presentation or attendance only, in case a participant does not wish to submit a paper for publication in the conference proceedings. Scientific Committee: Simon Arridge (UCL), Carola Bibiane-Schonlieb (Cambridge), Romina Gaburro (Limerick), Paul Ledger (Leicester), Daniel Lesnic (Leeds), Bill Lionheart (Manchester) and Marco Marletta (Cardiff). Local Organising Committee: Daniel Lesnic and Nataliia Kinash Cost: The purpose of this series of conference is to keep the conference fees accessible and as low as possible (approx. £80-100) to top-up expenses related to conference proceedings publication, room booking, lunches and conference dinner. Participants will need to make their own arrangements for travel and accommodation. Deadlines: 1st October 2026 – Abstract (approx. 100 words) submission (by email to D.Lesnic@leeds.ac.uk) 15th October 2026 - Notification of acceptance of abstracts 15th December 2026 – Submission of full paper for possible publication in the Conference Proceedings (if desired) 15th January 2027 – Notification of acceptance/revision of papers 15th February 2027 – Final papers due 1st March 2027 – Deadline for payment of the conference registration fee Contacts: Professor Daniel Lesnic (D.Lesnic@leeds.ac.uk), Dr Nataliia Kinash (N.Kinash@leeds.ac.uk) Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, UK ------------------------------------------------------- From: Weierstrass Institute michelle.bolinger@wias-berlin.de Date: July 01, 2026 Subject: Head of a Research Group (f/m/d) (Ref. 26/16) at the Weierstrass Institute, Germany WIAS invites applications for the position of Head of a Research Group (f/m/d (Ref. 26/16) in the Weierstrass Group on “Data-driven Control and Optimization" to be filled at the earliest possible date. Research focus: data‑driven control and optimization with applications in quantitative biomedicine, modern materials, and sustainable energy. Candidate profile: early‑career scientist with a PhD and an excellent record in applied mathematics, especially optimization. Preference for a profile combining theory and algorithms for PDE‑constrained optimization with mathematically founded AI / machine‑learning methods. Terms: full‑time (39 hrs/week), initial 3‑year appointment (TVöD Bund) with possible renewal after positive evaluation. Resources: funding for research staff, dedicated budget for travel and visiting researchers; integration into WIAS’s flexible research platform. The advertisement is open with immediate effect and will remain open until the position will be filled. Application details and submission instructions can be found here: https://short.sg/j/65552381 Further information: https://www.wias-berlin.de/index.jsp?lang=1 ------------------------------------------------------- From: Philipp Öffner philipp.oeffner@tu-clausthal.de Date: June 30, 2026 Subject: W3 Professorship in Mathematical Modelling, Clausthal University of Technology, Germany The Clausthal University of Technology is advertising a W3 Professorship in Mathematical Modelling (f/m/d) at the Institute of Mathematics. The professorship focuses on research and teaching in the development and analysis of mathematical models, in particular in the area of partial differential equations. The future holder of the position is expected to actively contribute to shaping the research profile of the institute and to participate in the further development of degree programmes, especially in applied mathematics. Further information and the full job advertisement can be found here: https://karriere.tu-clausthal.de/jobposting/93b3c2cf2bcc487bdd2a8af29660f59080ffd9430?ref=homepage We welcome everybody for applications. ------------------------------------------------------- From: Jennifer Ryan jryan@kth.se Date: June 29, 2026 Subject: Tenure-track Lerheden Assistant Professor position in Applied Mathematics at KTH, Sweden Tenure-track Lerheden Assistant Professor, Department of Mathematics, KTH Mathematics with specialization in Applied Mathematics The Math department at KTH has an opening for a tenure-track Lerheden faculty position in Applied Mathematics at KTH. The position is in foundational mathematical research motivated by applications in one or several of the areas Stochastic control, Optimization under uncertainty, Inverse problems, and numerical methods within these areas. The position includes a starting package for hiring one PhD student. Application deadline: September 17, 2026. https://www.kth.se/lediga-jobb/936948?l=en Candidates who received PhD during the last 7 years (not including time for parental leave etc.) are prioritized. Applications require the KTH CV template: https://www.kth.se/en/om/jobba-pa-kth/cv-mall-for-anstallning-och-befordran-av-larare-kth-1.471907 ------------------------------------------------------- From: Jens Schulz jens.schulz@mosek.com Date: July 03, 2026 Subject: Open position for a specialist in sparse linear algebra, MOSEK, Denmark or world-wide At MOSEK, we are looking for a candidate interested and experienced in developing software for large-scale sparse linear algebra problems. The candidate's primary task will be to improve the efficiency of the parallel sparse Cholesky computation, exploit GPU architectures and enhance our first-order methods. See here for more information: https://www.mosek.com/about/career-options/ We recommend to apply if you have proven records for the following: - Excellent programming skills in C or C++. - Deep technical proficiency with sparse numerical linear algebra is a must-have. - Expertise in working with e.g., oneAPI TBB or OpenMP to implement parallel/multi-threaded programs - Familiarity with the usage of BLAS and CUDA libraries for solving linear algebra problems - Location: Copenhagen Office or remote world-wide Follow the job description and announcements on our LinkedIn: https://www.linkedin.com/company/205193 ------------------------------------------------------- From: Jose A Cuminato jacuminato@gmail.com Date: June 26, 2026 Subject: Post Doc Position in Brazil Title: Hemodynamic Effects of Artificial Aortic Valves on the Formation and Persistence of Swirling Blood Flow The Institute of Mathematics and Computer Science (ICMC-USP) invites applications for a postdoctoral fellowship in Computational Fluid Dynamics. Blood flow in the ascending aorta naturally develops swirling structures due to the interaction between ventricular contraction, aortic valve geometry, and vascular anatomy. These flow patterns contribute to efficient blood transport, reduced energy dissipation, and favorable wall shear stress distributions. Alterations in swirling flow have been linked to several cardiovascular diseases. Although prosthetic aortic valves are designed to restore forward flow and reduce pressure gradients, their ability to reproduce the physiological hemodynamic environment remains unclear. Differences in swirling flow may affect energy losses, blood-cell damage, thrombogenic risk, and long-term vascular remodeling. This project will investigate how different prosthetic valve designs influence the generation and persistence of swirling blood flow in the ascending aorta. The objective is to improve the understanding of the relationship between valve design and cardiovascular hemodynamics, contributing to the development of more efficient and physiologically compatible valve prostheses. The research will be carried out in collaboration with FECFAU-Unicamp and InCor-USP, using C++ implementations based on the LS-DYNA and IBAMAR framework. Desired qualifications: degree in Engineering, Applied Mathematics, or Applied Physics; PhD in Computational Mechanics with emphasis on fluid-structure interaction; experience in numerical modelling, computational simulation, and C++ programming; willingness to work in a multidisciplinary research environment. To apply, send your CV and a recommendation letter to jacuminato@gmail.com before July 31st 2026. ------------------------------------------------------- From: Silvia Lebosi silvia.lebosi@uni-graz.at Date: July 03, 2026 Subject: Postdoc Position in mathematical optimization at University of Graz, Austria The University of Graz is offering following Postdoc Position at the Dept. of Mathematics and Scientific Computing: Responsibilities: • Independent research and publication activities in the field of mathematical optimization with focus on nonsmooth optimization, stochastic optimization, or optimal control of partial differential equations • Participation in interdisciplinary cooperation projects and third-party funded projects, in particular the SFB MR-DYNAMO • Independent teaching of courses in the field of applied mathematics, supervision of students and holding of examinations • Participation in organizational and administrative matters • Possibility to work on a relevant habilitation or qualification for a professorship Profile: • Doctoral degree in a mathematical branch of study • Solid knowledge of one of the following fields: infinite- dimensional optimization, nonsmooth optimization, or optimal control • Experience in numerical realization of optimization algorithms (desirable) • Ability for integration into the department’s research profile and in particular into interdisciplinary cooperation projects (SFB MR-DYNAMO) • Very good command of English • Ability to teach in German (after a transition period of 2 years) • Ability to work independently • Didactic aptitude for independent teaching • Capacity for teamwork, organizational talent and ability to communicate Application Documents • Specific letter of motivation • Academic CV including list of relevant publications • Letter of reference We offer an annual gross salary of € 70,200.20 for a fulltime position. URL for detailed information: https://jobs.uni-graz.at/de/jobs/c4167145-197f-eb8f-d181-69f083e5e40d?preview=true ------------------------------------------------------- From: Weierstrass Institute michelle.bolinger@wias-berlin.de Date: July 01, 2026 Subject: Two Postdoctoral Research Positions (f/m/d) in mathematical statistics, WIAS, Germany WIAS invites applications for two Postdoctoral Research Position (f/m/d) in mathematical statistics (Ref. 26/10) in the Research Group "Stochastic Algorithms and Nonparametric Statistics" to be filled by September 1, 2026. Employer: Weierstrass Institute for Applied Analysis and Stochastics (WIAS), part of Forschungsverbund Berlin e.V. (Leibniz Association). Position: Two Postdoctoral Research Positions in Mathematical Statistics (Ref. 26/10) in the Research Group “Stochastic Algorithms and Nonparametric Statistics.” Start/Deadline: To be filled by 1 September 2026. Research focus: statistical theory of machine learning, stochastic algorithms/optimization, optimal transport, and stochastic analysis (e.g. finance). Responsibilities: independent and collaborative research, publications, presentations at seminars/conferences, and participation in funding acquisition. Candidate profile: PhD with a strong track record in mathematical statistics and/or ML theory; stochastic analysis is a plus; alignment with the group’s research preferred. Terms: full‑time (39 h/week); initial appointment of 1 or 2 years (extension possible subject to funding); salary according to TVöD Bund. Application details and submission instructions can be found here: https://short.sg/j/65248656 Further information: https://www.wias-berlin.de/index.jsp?lang=1 ------------------------------------------------------- From: Cornelia Boehnstedt contact@pharmetrx.de Date: July 01, 2026 Subject: PhD fellowship, PharMetrX program, Potsdam/Berlin, Germany The Graduate Research Training Program PharMetrX: Pharmacometrics & Computational Disease Modelling is an interdisciplinary PhD program bridging pharmacy and mathematics. PharMetrX aims at understanding the drug-patient-disease interaction by analysing data of drug concentration, effect & disease profiles of pre-/clinical trials and of therapeutic care by developing and applying pharmacometric (i.e. PK, PD, disease) mathematical & statistical models. We are currently inviting applications to enrol in the PharMetrX Research+ Program or the PharMetrX Training+ Program. The PharMetrX Research+ Program (Research & Training & Network) comprises an excellent research environment in the vibrant Berlin/ Potsdam area, fascinating and innovative research projects in a highly relevant field, truly transdisciplinary working groups and supervision, an individual mentorship from one of the associated industry partner consortium, a specifically tailored training program of compact academic and industry modules, a network of 133 peers and a competitive 3.5 years fellowship. The PharMetrX Training+ Program (Training & Network) offers a specifically tailored training program of compact academic and industry modules that convey the foundations in pharmacokinetics & pharmacodynamics, systems biology, statistics, methodological approaches of modelling & simulation etc. as well as a network of 133 peers. It is open for PhD students who have started their PhD since mid-September 2025 in the field of pharmacometrics or will do so soon. Both programs are open to candidates with a university degree in pharmacy, pharmaceutical sciences, mathematics/statistics, bioinformatics, life sciences or medicine: see https:// www.PharMetrX.de and https://www.linkedin.com/company/pharmetrx. Deadline for applications: 06 September 2026. Start of Module Curriculum: March 2027 PharMetrX is a joint program of Freie Universität Berlin and University of Potsdam, supported by a consortium of global research-driven pharmaceutical companies. ------------------------------------------------------- From: Saul Buitrago Boret sssbuitrago@gmail.com Date: June 26, 2026 Subject: Contents, Bulletin of Computational Applied Mathematics, Vol.13, N1 Table of Contents Bulletin of Computational Applied Mathematics, Vol.13, N1 http://www.compama.co.usb.ve/table-of-contents https://sites.google.com/usb.ve/bullcompama/table-of-contents Local fractional derivative with respect to g Guillermo Alexis Albuja-Proaño, L. Balseca-Campaña, S. Cedeño-Mendoza, Julio Cesar Galarraga-Calero, J. Romero-Quinaluisa Hermite-Hadamard's Inequalities for Norm Linear Space Convex Functions via Fractional Type Inequalities Ashok Kumar Sahoo, Bibhakar Kodamasingh, Prasanta Kumar Raut, Binod Chandra Tripathy Ultimate Boundedness Criteria for Third-Order Nonlinear Differential Equations Daniel Oluwasegun Adams, Juan E. Nápoles Valdés Generalized k-center Steiner Wiener index of a graph Bheemanna Sarveshkumar, Basavaraju Chaluvaraju, Deena Sunil Sharanappa Dynamic of an irregular orthotropic micropolar semi-infinite media under the action of moving load Anup Saha, Sandip Kumar Das A microbiological application of new types of bi-ideal nano continuities Kamalpreet Kaur, Asha Gupta On Deferred Statistical Convergence of order $\alpha$ in Neutrosophic Normed Spaces Shyamal Debnath, Santonu Debnath, Chiranjib Choudhury Simpson-like type inequalities for q-differentiable convex functions via quantum calculus Djaber Chemseddine Benchettah, Meriem Merad, Wedad Saleh, Badreddine Meftah, Abdelghani Lakhdari k^{th}-eccentricity index of some graphs Veena Mathad Parvathi, Ismail Naci Cangul Three-step iterative scheme for convergence and stability of a generalized set-valued mixed variational inequality problem Khalid Fayaz, Mudasir A. Malik, Mohd Iqbal Bhat, Mahak Majeed ------------------------------------------------------- End of Digest **************************