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Akademický článek

Integration-by-parts reductions of Feynman integrals using Singular and GPI-Space

Autor: Dominik Bendle, Janko Böhm, Wolfram Decker, Alessandro Georgoudis, Franz-Josef Pfreundt, Mirko Rahn, Pascal Wasser, Yang Zhang

Publikováno v: Journal of High Energy Physics, Vol 2020, Iss 2, Pp 1-34 (2020)

Abstract We introduce an algebro-geometrically motived integration-by-parts (IBP) re- duction method for multi-loop and multi-scale Feynman integrals, using a framework for massively parallel computations in computer algebra. This framework combines

Externí odkaz: https://doaj.org/article/07b5fcf860874e169d919a6f640dced2

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Towards Massively Parallel Computations in Algebraic Geometry

Autor: Janko Böhm, Franz-Josef Pfreundt, Mirko Rahn, Lukas Ristau, Wolfram Decker, Anne Frühbis-Krüger

Publikováno v: Foundations of Computational Mathematics. 21:767-806

Introducing parallelism and exploring its use is still a fundamental challenge for the computer algebra community. In high-performance numerical simulation, on the other hand, transparent environments for distributed computing which follow the princi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::562c68746c45b8d7a991256bba724882
https://doi.org/10.1007/s10208-020-09464-x

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Integration-by-parts reductions of Feynman integrals using Singular and GPI-Space

Autor: Yang Zhang, Wolfram Decker, Alessandro Georgoudis, Mirko Rahn, Janko Böhm, Pascal Wasser, Dominik Bendle, Franz-Josef Pfreundt

Publikováno v: Journal of High Energy Physics
Journal of High Energy Physics, Vol 2020, Iss 2, Pp 1-34 (2020)

We introduce an algebro-geometrically motived integration-by-parts (IBP) reduction method for multi-loop and multi-scale Feynman integrals, using a framework for massively parallel computations in computer algebra. This framework combines the compute

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d4b8a8051dd3b24b6cd4e831d6f19c6
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-407628

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Module Intersection for the Integration-by-Parts Reduction of Multi-Loop Feynman Integrals

Autor: Yang Zhang, Janko Boehm, Dominik Bendle, Wolfram Decker, Alessandro Georgoudis, Franz-Josef Pfreundt, Mirko Rahn

Publikováno v: PoS
MathemAmplitudes 2019: Intersection Theory and Feynman Integrals
MathemAmplitudes 2019: Intersection Theory and Feynman Integrals, Dec 2019, Padova, Italy. pp.004, ⟨10.22323/1.383.0004⟩
MathemAmplitudes 2019: Intersection Theory and Feynman Integrals, Dec 2019, Padova, Italy

In this manuscript, which is to appear in the proceedings of the conference "MathemAmplitude 2019" in Padova, Italy, we provide an overview of the module intersection method for the the integration-by-parts (IBP) reduction of multi-loop Feynman integ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fdc9a824f6a55769269d6546adc6fab0

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On the stability of bismuth in modified carbon felt electrodes for vanadium redox flow batteries: An in-operando X-ray computed tomography study

Autor: André Hilger, Mirko Rahn, Ingo Manke, Christina Roth, Markus Osenberg, Jacob Mayer, Marcus Gebhard, Jonathan Schneider, Tim Tichter

Publikováno v: Journal of Power Sources. 478:228695

Decorating carbon felt electrodes with bismuth and bismuth oxide nanoparticles is proposed to be a promising strategy for enhancing the sluggish electron transfer kinetics of the negative half-cell reaction in vanadium redox flow batteries. However,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::80015d735736900455054341f8142a34
https://doi.org/10.1016/j.jpowsour.2020.228695

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A directory/cache for leveraging the efficient use of distributed memory by task-based runtime systems

Autor: Tiberiu Rotaru, Bernd Lörwald, Nick Brown, Mirko Rahn, Olivier Aumage, Vicenç Beltran, Xavier Teruel, Jan Ciesko, Jakub Sistek

Publikováno v: Rotaru, T, Lörwald, B, Brown, N, Rahn, M, Aumage, O, Beltran, V, Teruel, X, Ciesko, J & Sistek, J 2018, ' A directory/cache for leveraging the efficient use of distributed memory by task-based runtime systems ', 5th International Conference on Exascale Applications and Software, Edinburgh, United Kingdom, 17/04/18-19/04/18 .
University of Edinburgh-PURE

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::12b42d272f089371ba6612b6cdd3f57b
https://www.pure.ed.ac.uk/ws/files/58837251/EASC2018_paper_23_2_.pdf

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Interoperability of GASPI and MPI in Large Scale Scientific Applications

Autor: Roman Iakymchuk, Erwin Laure, Tiberiu Rotaru, Dana Akhmetova, Christian Simmendinger, Mirko Rahn, Stefano Markidis, Valeria Bartsch, Luis Cebamanos

Publikováno v: Parallel Processing and Applied Mathematics ISBN: 9783319780535
PPAM (2)
Lecture Notes in Computer Science
Lecture Notes in Computer Science-Parallel Processing and Applied Mathematics

One of the main hurdles of a broad distribution of PGAS approaches is the prevalence of MPI, which as a de-facto standard appears in the code basis of many applications. To take advantage of the PGAS APIs like GASPI without a major change in the code

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f975b1f841dade7d047d09a0968b220
https://doi.org/10.1007/978-3-319-78054-2_26

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GASPI/GPI In-memory Checkpointing Library

Autor: Mirko Rahn, Rui Machado, Valeria Bartsch, Dirk Merten, Franz-Josef Pfreundt

Publikováno v: Lecture Notes in Computer Science ISBN: 9783319642024
Euro-Par

Fault tolerance becomes an important feature at large computer systems where the mean time between failure decreases. Checkpointing is a method often used to provide resilience. We present an in-memory checkpointing library based on a PGAS API implem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5a368a9cec11ba41edf01e627c02fda
https://doi.org/10.1007/978-3-319-64203-1_36

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The EPiGRAM Project: Preparing Parallel Programming Models for Exascale

Autor: Rui Machado, Ivy Bo Peng, Jesper Larsson Träff, Alistair Hart, Stefano Markidis, Antoine Rougier, Mirko Rahn, Daniel J. Holmes, Valeria Bartsch, Mark Bull, Erwin Laure

Publikováno v: Lecture Notes in Computer Science ISBN: 9783319460789
ISC Workshops

EPiGRAM is a European Commission funded project to improve existing parallel programming models to run efficiently large scale applications on exascale supercomputers. The EPiGRAM project focuses on the two current dominant petascale programming mode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62476a55fd1f426bec891acdbbea5502
https://doi.org/10.1007/978-3-319-46079-6_5

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More decidable instances of Post's correspondence problem: beyond counting

Autor: Mirko Rahn

Publikováno v: Information Processing Letters. 106:115-119

We present a new technique to decide or reduce instances of Post's correspondence problem. It generalizes balance arguments to a consideration about some special context-free languages which allow the combination with other decision (or reduction) te

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::01594780c7c36723017b7b0af1198d7c
https://doi.org/10.1016/j.ipl.2007.11.002

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