Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Four spacetime dimensional simulation of rheological waves in solids and
  the merits of thermodynamics   The recent results attained from a thermodynamically conceived numerical
scheme applied on wave propagation in viscoelastic/rheological solids are
generalized here, both in the sense that the scheme is extended to four
spacetime dimensions and in the aspect of the virtues of a thermodynamical
approach. Regarding the scheme, the arrangement of which quantity is
represented where in discretized spacetime, including the question of
appropriately realizing the boundary conditions, is nontrivial. In parallel,
placing the problem in the thermodynamical framework proves to be beneficial in
regards to monitoring and controlling numerical artefacts - instability,
dissipation error, and dispersion error. This, in addition to the observed
preciseness, speed, and resource-friendliness, makes the thermodynamically
extended symplectic approach that is presented here advantageous above
commercial finite element software solutions.

34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th