Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Super-Exponential Decaying Property of Odd-Dimensional Wave Scattered
  by an Obstacle   We examine an inverse backscattering property of wave motion imposed by an
obstacle. We show that if the wave propagator decays super-exponentially along
the back-scattered geodesics, then the involved scatterer must be trivial. In
particular, if the fundamental solution decays super-exponentially some time
after t=0, it vanishes for all time. We use finite speed of propagation in this
article.

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The categories of this paper are: bayes-an
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys