Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tent pitching and Trefftz-DG method for the acoustic wave equation   We present a space-time Trefftz discontinuous Galerkin method for
approximating the acoustic wave equation semi-explicitly on tent pitched
meshes. DG Trefftz methods use discontinuous test and trial functions, which
solve the wave equation locally. Tent pitched meshes allow to solve the
equation elementwise, allowing locally optimal advances in time. The method is
implemented in NGSolve, solving the space-time elements in parallel, whenever
possible. Insights into the implementational details are given, including the
case of propagation in heterogeneous media.

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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin