Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymptotic Boundary Observability for the Wave Equation on One Side of a
  Planar Triangle   We consider the wave equation $(\partial_t^2-\Delta)u=0$ on a planar
triangular domain $\Omega\subset\mathbb{R}^2$ with Dirichlet boundary
conditions. We use a commutator and integration by parts argument similar to
that in \cite{Chr2DTriangles} by the first author to obtain an observability
asymptotic for any one side of the triangle. Our result is particular to
triangular domains and does not hold for polygons in general.

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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: physics
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci