Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The skew spectrum of functions on finite groups and their homogeneous
  spaces   Whenever we have a group acting on a class of functions by translation, the
bispectrum offers a principled and lossless way of representing such functions
invariant to the action. Unfortunately, computing the bispectrum is often
costly and complicated. In this paper we propose a unitarily equivalent, but
easier to compute set of invariants, which we call the skew spectrum. For
functions on homogeneous spaces the skew spectrum can be efficiently computed
using some ideas from Clausen-type fast Fourier transforms.

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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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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: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: cond-mat