Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Simflowny-based finite-difference code for high-performance computing
  in Relativity   The tremendous challenge of comparing our theoretical models with the
gravitational-wave observations in the new era of multimessenger astronomy
requires accurate and fast numerical simulations of complicated physical
systems described by the Einstein and the matter equations. These requirements
can only be satisfied if the simulations can be parallelized efficiently on a
large number of processors and advanced computational strategies are adopted.
To achieve this goal we have developed Simflowny, an open platform for
scientific dynamical models which automatically generates parallel code for
different simulation frameworks, allowing the use of HPC infrastructures to
non-specialist scientists. One of these frameworks is SAMRAI, a mature
patch-based structured adaptive mesh refinement infrastructure, capable of
reaching exascale in some specific problems. Here we present the numerical
techniques that we have implemented on this framework by using Simflowny in
order to perform fast, efficient, accurate and highly-scalable simulations.
These techniques involve high-order schemes for smooth and non-smooth
solutions, Adaptive Mesh Refinement with arbitrary resolution ratios and an
optimal strategy for the sub-cycling in time. We validate the automatically
generated codes for the SAMRAI infrastructure with some simple test examples
(i.e., wave equation and Newtonian MHD) and finally with the Einstein
equations.

28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex