Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Young's and shear moduli and Poisson's ratio for elastic media of high
  and middle symmetry   Using bases of fourth rank tensorial bases of complete Voigt's symmetry
elaborated by Walpole we obtained expressions for inverse of Young's modulus E,
inverse of shear modulus G and Poisson's ratio, which depend on components of
the stiffness tensor S, on direction cosines of vectors n of uniaxial load and
the vector m of lateral strain with crystalline symmetry axes. Crystalline
media of high and medium symmetries are considered. Such representation yields
decomposition of the above elastic characteristics to isotropic and anisotropic
parts. Expressions for Poisson's coefficient are well suited for studying the
property of auxeticity.

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The categories of this paper are: physics
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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph