Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Life and science of Alexey N. Gerasimov. On the linear operators,
  elastic viscosity, elevterous and fractional derivatives   Dedicated to the 120th anniversary of the birth of Alexey N. Gerasimov, one
of the initiators of Fractional Calculus in Solid Mechanics. We provide a brief
sketch of his life and the scientific contributions of the Soviet mechanician
A.N.Gerasimov are given.

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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: atom-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: funct-an