Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: De-suspension of free S3 - actions on Homotopy Spheres   In the paper of Montgomery, D. and Yang, C.T. [5], they discuss the
de-suspension of smooth free actions of S1 on (2n+1)-dimensional homotopy
spheres. In this paper we discuss the de-suspension of smooth free actions of
S3 on (4n + 3)-dimensional homotopy spheres.

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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: astro-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th