Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The relativistic Burgers equation on a de Sitter spacetime. Derivation
  and finite volume approximation   The inviscid Burgers equation is one of the simplest nonlinear hyperbolic
conservation law which provides a variety examples for many topics in nonlinear
partial differential equations such as wave propagation, shocks and
perturbation, and it can easily be derived by the Euler equations of
compressible fluids by imposing zero pressure in the given system. Recently,
several versions of the relativistic Burgers equations have been derived on
different geometries such as Minkowski (flat), Schwarzshild and FLRW spacetimes
by LeFloch and his collaborators. In this paper, we consider a family member of
the FLRW spacetime so-called the de Sitter background, introduce some important
features of this spacetime geometry with its metric and derive the relativistic
Burgers equation on it. The Euler system of equations on the de Sitter
spacetime can be found by a known process by using the Christoffel symbols and
tensors for perfect fluids. We applied the usual techniques used for the
Schwarzshild and FLRW spacetimes in order to derive the relativistic Burgers
equation from the vanishing pressure Euler system on the de Sitter background.
We observed that the model admits static solutions. In the final part, we
examined several numerical illustrations of the given model through a finite
volume approximation based on the paper by LeFloch et al. The effect of the
cosmological constant is also numerically analysed in this part. Furthermore, a
comparison of the static solution with the Lax Friedrichs scheme is implemented
so that the results demonstrate the efficiency and robustness of the finite
volume scheme for the derived model

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The categories of this paper are: hep-th
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex