Subject: NA Digest, V. 21, # 14 NA Digest Sunday, April 18, 2021 Volume 21 : Issue 14 Today's Editor: Daniel M. Dunlavy Sandia National Labs [log in to unmask] Today's Topics: New Software, HSS Matrices, Julia Software Release, AMG4PSBLAS v. 1.0 - rc1 Course, Parallel Computing with MPI, Jun-Jul 2021 Modelling the Cardiac Function, ONLINE, Jul 2021 Summer School, Shape and Topology Optim, Austria, Jul 2021 Computer Aspects of Numerical Algorithms, ONLINE, Sep 2021 Postdoc Position, Computational Science, Univ of Minnesota Postdoc Position, Coupling Multi-physics Problems, IFPEN PhD Position, Applied Mathematics, KU Leuven PhD Position, Linkoping Univ, Sweden PhD Position, Mixing and Resonances in Magnetic Fluids, KIT PhD Position, Univ of Strathclyde, Glasgow, UK PhD Positions, Computational UQ, Technical Univ of Denmark CFP, CMB, COVID-19 and Dynamics of Infectious Diseases Subscribe, unsubscribe, change address, or for na-digest archives: http://www.netlib.org/na-digest-html/faq.html Submissions for NA Digest: http://icl.utk.edu/na-digest/ ------------------------------------------------------- From: Boris Bonev [log in to unmask] Date: April 16, 2021 Subject: New Software, HSS Matrices, Julia We are happy to announce the release of our new library for working with HSS matrices - HssMatrices.jl. You can find out more details here: https://github.com/bonevbs/HssMatrices.jl ------------------------------------------------------- From: Fabio Durastante [log in to unmask] Date: April 14, 2021 Subject: Software Release, AMG4PSBLAS v. 1.0 - rc1 The AMG4PSBLAS development team gladly announce the release of version 1.0 (release candidate 1 - rc1) of the package. AMG4PSBLAS (Algebraic MultiGrid Preconditioners Package based on PSBLAS) is a package of parallel algebraic multilevel preconditioners included in the PSCToolkit (Parallel Sparse Computation Toolkit) software framework (https://psctoolkit.github.io/); its development is supported by the EU-H2020 EoCoE (Energy Oriented Center of Excellence) project, and the package has been selected by EU Innovation Radar as recent excellent innovation. AMG4PSBLAS is designed to provide scalable and easy-to-use preconditioners in the context of the PSBLAS (Parallel Sparse Basic Linear Algebra Subprograms) parallel computing framework, to be used in conjunction with the PSBLAS Krylov solvers. The library uses a fully algebraic approach to generate a hierarchy of coarse-level matrices and operators; it includes a new parallel-coupled aggregation algorithm exploiting maximum edge-weighted matchings. The preconditioners in AMG4PSBLAS can combine different types of AMG cycles with many smoothers and coarsest-level solvers. AMG4PSBLAS runs on most parallel computers, requiring only PSBLAS, the BLAS, and MPI. A GPU plugin for PSBLAS (available separately from https://psctoolkit.github.io/) enables the execution of AMG4PSBLAS applications on clusters with hybrid CPU/GPU nodes. ------------------------------------------------------- From: Matthias Gobbert [log in to unmask] Date: April 13, 2021 Subject: Course, Parallel Computing with MPI, Jun-Jul 2021 I am offering my 3-credit senior undergraduate level course on Parallel Computing in the UMBC Summer session 2021, June 01 to July 08. This can be an effective way for any student, undergraduate or graduate, to gain a quick introduction to this important topic. I would appreciate identifying interested and suitable students and forward of this ad to anyone with potential use of this course. It would require paying tuition to UMBC for 3 undergraduate credits, but the course would be fully transferable to the home institution. Admission to UMBC would be as non-degree seeking student and is stream-lined for the special sessions. The URL with a detailed schedule and list of topics is below. Do not hesitate to let me know, if you have questions. For complete information on the course with a detailed schedule and list of topics, please see https://www.umbc.edu/~gobbert/teaching/math447.20214/ Matthias Gobbert, gobbert@umbc, Math & Stat, UMBC ------------------------------------------------------- From: Luca Paglieri [log in to unmask] Date: April 16, 2021 Subject: Modelling the Cardiac Function, ONLINE, Jul 2021 2021 iHEART Online Conference Modelling the Cardiac Function July 1-3, 2021 https://iheart.polimi.it/mcf2021 This conference aims at highlighting the state of the art in the mathematical modelling and numerical simulation of the cardiac function and its clinical applications. The event will take place online and it will host plenary lectures from distinguished scientists as well as contributed talks. Abstract submission for contributed talks (15 min.) is now open, deadline is May 31. Plenary speakers: Luca Dede' (MOX, Politecnico di Milano, IT); Antonio Frontera (Ospedale San Raffaele, Milan, IT); Boyce Griffith (University of North Carolina at Chapel Hill, USA); Julius M. Guccione (University of California San Francisco, CA USA); Gianluca Pontone (Centro Cardiologico Monzino, Milan, IT); Kenji Takizawa (Waseda University, Tokyo JP); Natalia Trayanova (Johns Hopkins University, Baltimore MD USA); Alessandro Veneziani (Emory University, Atlanta GA USA) Important dates: May 31, 2021: abstract submission June 21, 2021: registration (free of charge) For more information, abstract submission and registration, visit https://iheart.polimi.it/mcf2021 ------------------------------------------------------- From: Peter Gangl [log in to unmask] Date: April 17, 2021 Subject: Summer School, Shape and Topology Optim, Austria, Jul 2021 In the framework of the GAMM Juniors, we are organizing a summer school on the topic of shape and topology optimization. The workshop is currently planned to take place in a hybrid format at Graz University of Technology between July 26 and 30, 2021. It is directed towards PhD students, master students and postdoctoral researchers who are working in or interested in the field of design optimization. The invited speakers are: - Gregoire Allaire (Ecole Polytechnique, Paris) - Michael Stingl (FAU Erlangen-Nurnberg) - Kevin Sturm (TU Wien) - Benedikt Wirth (WWU Munster) - Jun Wu (TU Delft) Deadline for registration: May 15, 2021 More information can be found on https://www.applied.math.tugraz.at/tagungen/samm21/ ------------------------------------------------------- From: Przemyslaw Stpiczynski [log in to unmask] Date: April 12, 2021 Subject: Computer Aspects of Numerical Algorithms, ONLINE, Sep 2021 We invite you to submit articles for 14th Workshop on Computer Aspects of Numerical Algorithms (CANA'21), https://www.fedcsis.org/2021/cana organized in conjunction with 2021 Federated Conference on Computer Science and Intelligence Systems (FedCSIS'21; IEEE). The workshop is devoted to numerical algorithms especially to the latest scientific trends in this area and to the problems related to the implementation of libraries of efficient numerical algorithms. The aim of the workshop is to meet scientists from various institutes and exchange experiences, as well as integrate research centers. Paper submission: May 24, 2021 Conference date: September 2-5, 2021 Contact: [log in to unmask] ------------------------------------------------------- From: Douglas Arnold [log in to unmask] Date: April 12, 2021 Subject: Postdoc Position, Computational Science, Univ of Minnesota The School of Mathematics at the University of Minnesota invites applications for a post-doctoral position in computational science and mathematics under the supervision of Douglas Arnold beginning Fall 2021 . The position is supported by the Simons Collaboration on Localization of Waves and will center on the research projects of the Collaboration. We seek a candidate with strong background in the numerical solution of partial differential equations and eigenvalue problems. Strength in both implementation and analysis are required. Prior experience with eigenvalue problems, wave propagation, and/or quantum physics is desirable. The salary will be commensurate with qualifications and experience. The preferred start date is no later than the start of the Fall semester of 2021 and could be sooner. The duration is two years, with a possibility of extending to the third year depending on funding and performance. Applicants should submit an AMS cover sheet, complete curriculum vitae, a description of their research and teaching, and at least three letters of recommendation at the Mathjobs website https://www.mathjobs.org/jobs/list/16621. A cover letter relating the applicant's research goals and qualifications to the projects would enhance the application. The University of Minnesota is an Equal Opportunity Educator and Employer. ------------------------------------------------------- From: Ani Anciaux [log in to unmask] Date: April 13, 2021 Subject: Postdoc Position, Coupling Multi-physics Problems, IFPEN In the context of geomechanical simulations, a proof of concept of coupling between a mechanical simulation code and a porous media flow simulation code has been implemented at IFPEN. After an analysis of the existing coupled code, the postdoctoral fellow will develop a new coupling tool in order to increase the performance of the existing coupled code, to improve its robustness and, possibly, its scalability. Research program: study of existing coupling libraries (e.g.: CWIPI, Padawan, Precice) in order to be able to select the most suitable one for the new coupling tool ; study of the existing coupling tool and of the coupled codes, analysis of the physics of the coupled phenomena; selection of the coupling library to use for the new coupling tool; realization of a POC for the defined use case (geomechanical coupling between a flow code in a porous medium and a mechanical simulator, such as Code_Aster.); study of the implementation of a direct communication scheme replacing the centralized one used in the existing coupling tool; study of the possibility to use more efficient iterative coupling algorithms for non-linear problems by replacing the fixed point algorithm currently used in the existing coupled code. Required skills: knowledge of C/C++, Fortran 90/2003, Python, numerical analysis, code coupling, Linux; Duration: 12 months; Simulation environment: IFPEN Linux HPC cluster; Supervision: multidisciplinary teams with mathematical, physical and computer skills. Location: IFPEN (Rueil-Malmaison) and Andra (Chatenay-Malabry) Contact: Bernard Vialay: [log in to unmask], Daniele Colombo: [log in to unmask] and Ani Anciaux-Sedrakian: ani.anciaux- [log in to unmask] ------------------------------------------------------- From: Wim Michiels [log in to unmask] Date: April 14, 2021 Subject: PhD Position, Applied Mathematics, KU Leuven PhD position "Control oriented analysis of linear periodic delay-differential algebraic equations" @KU Leuven Delay-differential algebraic equations (DDAEs) naturally appear in mathematical models for large-scale dynamical systems. A systematic description of the different components of the system and their interconnections naturally leads to a combination of differential equations and algebraic constraints, while delays in the model describe heredity, propagation and communication lags. The PhD project contributes to the construction of an overarching mathematical framework for the analysis of linear time-invariant and time-periodic DDAEs. First, the fundamental theory will be addressed, contributing to the stability and Floquet theory, and to perturbation theory. Second, analysis methods and computational tools will be designed to assess and optimize the dynamic behavior of the modeled system. Distinctive methodological features are the role of duality, in a system theoretic sense, and connections with eigenvalue problems. The mathematical and computational tools will be validated on applications in control engineering and vibration control, in the framework of ongoing collaborations of the hosting research group. The ideal candidate has a MSc degree in mathematics (applied, computational) or mathematical engineering. We offer a fully funded PhD position in an international context at the NUMA section of KU Leuven, a top university and hub for interdisciplinary research in the fields of Applied Mathematics and Systems & Control. The position is open until a suitable candidate has been found. How to apply: send an application package (cv, transcripts, motivation letter, refs.) to [log in to unmask], with subject "vac-ddae" ------------------------------------------------------- From: Yura Malitsky [log in to unmask] Date: April 12, 2021 Subject: PhD Position, Linkoping Univ, Sweden The department of Mathematics at Linkoping University seeks applications for a PhD student position in the area of mathematical optimization theory with the aim of developing new techniques for machine learning. The position is for 4 years without teaching or 5 years with teaching. The doctoral student will be supervised by Dr. Oleg Burdakov and Dr. Yura Malitsky The application deadline is May 7, 2021. The full job ad: https://liu.se/en/work-at-liu/vacancies?rmpage=job&rmjob=15910&rmlang=UK The position is funded by a national Swedish initiative within the Wallenberg AI, Autonomous Systems and Software Program (WASP). For more information on WASP graduate school, please visit: https://wasp-sweden.org/graduate-school/. ------------------------------------------------------- From: Laurette Lauffer [log in to unmask] Date: April 15, 2021 Subject: PhD Position, Mixing and Resonances in Magnetic Fluids, KIT Doctoral Researcher (f/m/d - 75 %) for the CRC 1173 Project "Mixing and resonances in magnetic fluids" We seek for an ambitious doctoral researcher with an interest in partial differential equations and fluid dynamics. You will study the dispersive properties of mixing and learn about resonance effects in magnetic fluids. You will have the opportunity to attend conferences, workshops, and summer schools. Engagement in teaching is encouraged. We provide an inspiring, attractive, interdisciplinary, and internationally recognized scientific environment with access to excellent facilities of the KIT, a wide scope of advanced training options within our integrated research training group, and flexible working time models. Our CRC aims at the implementation of equal opportunities, it promotes diversity and supports persons with childcare or eldercare responsibilities as well as persons with disabilities. Funds for travel and guests are available through the CRC. The following qualifications are required: Excellent Master or an equivalent degree in Mathematics. Strong background in one of the following fields: partial differential equations, harmonic analysis, mathematical physics. We expect good writing and oral communication skills in English along with the ability to work independently within an international team. Applications should include a cover letter, a curriculum vitae, a statement of research interest, contact information for two referees, and copies of degree certificate(s). Please apply until 14.05.2021 using the vacancy number 2009/2021, and electronically via [log in to unmask] For further information, please contact Dr. Christian Zillinger, [log in to unmask], or Ms. Laurette Lauffer, [log in to unmask] ------------------------------------------------------- From: Victorita Dolean [log in to unmask] Date: April 12, 2021 Subject: PhD Position, Univ of Strathclyde, Glasgow, UK A fully funded three-year PhD studentship is available in the Department of Mathematics and Statistics at the University of Strathclyde, Glasgow, United Kingdom. The intra-disciplinary research will be undertaken primarily within the Numerical Analysis and Scientific Computing group but the student will also have the opportunity to interact with the Applied Analysis group. Mathematical and numerical modelling is unavoidable nowadays when one tries to investigate and understand complex physical phenomena such as seismic or electromagnetic wave propagation problems. When developing realistic mathematical models for large-scale physical applications, one bottleneck in the procedure is often the efficient and effective solution of the resulting matrix equations. In addition to the inherent difficulties one can encounter in complex applications, we often experience extra difficulties when dealing with time-harmonic wave propagation problems. These difficulties stem from the indefinite or non-self-adjoint nature of the operators involved. This requires a paradigm shift in the design and analysis of solvers. The aim of this project is to build and analyse a new generation of spectral preconditioners based on generalised eigenvalue problems allowing a robust behaviour with respect to the physical properties of the medium. This requires a combination of numerical analysis and spectral analysis tools. The outcome will be both mathematical but also practical, as this will fundamentally change the state of the art of solvers and the results will be incorporated in open-source software. Applicants should have, or be expecting to obtain in the near future, a first class or good 2.1 honours degree (or equivalent) in mathematics or a mathematical science. Deadline for application 10th May. Funding Notes: The studentship covers full tuition fees and a tax-free stipend for three years starting on a commonly agreed date. Funding is only available to UK nationals and to EU nationals. For more information contact: [log in to unmask] and [log in to unmask] ------------------------------------------------------- From: Per Christian Hansen [log in to unmask] Date: April 13, 2021 Subject: PhD Positions, Computational UQ, Technical Univ of Denmark The Technical University of Denmark opens several 3-year PhD positions starting in the fall of 2021. They are part of the research project CUQI: Computational Uncertainty Quantification for Inverse problems www.compute.dtu.dk/english/cuqi. Our goal is to create a platform for modeling and computations needed to apply UQ to a range of inverse problems in academia and industry. All PhD students will work individually and as team members supported by dedicated supervisors. Applicants are also expected to contribute to teaching, training activities, and supervision of students. The PhD positions will focus on four areas: - Handling large-scale inverse problems via dimensionality reduction, surrogate modeling, multi-fidelity sampling algorithms, etc. We also study how to handle errors and uncertainties in the reconstr. model. - Development and use of stochastic optimization methods for efficient sampling and for handling of implicitly given priors without the need to tune the algorithm parameters. - Theory, algorithms and diagnostic tools for handling uncertain parameters in the likelihoods and priors via hyper-parameters and associated hyper-priors. - Besov priors for producing piecewise smooth reconstructions and for detection of edges and interfaces, e.g., in PDE formulations of image deblurring and computed tomography. For more details and to apply (deadline May 25), see: https://tinyurl.com/CUQI-PhD-5 Per Christian Hansen, Yiqiu Dong and Martin S. Andersen ------------------------------------------------------- From: Weihua Geng [log in to unmask] Date: April 13, 2021 Subject: CFP, CMB, COVID-19 and Dynamics of Infectious Diseases The ongoing pandemic of coronavirus disease 2019 (COVID-19) has created significant threats to the public health and world economy. Numerous computational and mathematical studies have been conducted to accelerate the COVID-19 research. To provide a fast publication channel for such studies, the De Gruyter affiliated and SCOPUS and MathSciNet indexed journal Computational and Mathematical Biophysics (CMB, https://www.degruyter.com/view/j/cmb), will publish a special issue on "COVID-19 and Dynamics of Infectious Diseases". For this special issue focusing on the dynamics features of infectious diseases, we are looking for innovative and unpublished research on SIR model and Fisher-Kolmogorov model and their related mathematical modeling, theoretical analysis, data fitting, and numerical simulation for combating the COVID-19. Additional potential topics included can be found on the CMB journal website. Prospective authors should submit their manuscript online at https://www.editorialmanager.com/mlbmb/default.aspx, and select the Article Type as this special issue. Please contact the CMB Journal Editor at: [log in to unmask] for any questions. Important Dates: Manuscript due: July 1st, 2021; First round of reviews: August 15th, 2021; Anticipated publication date: October 31st, 2021 ------------------------------------------------------- End of Digest **************************