Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The exterior derivative of the Lee form of almost Hermitian manifolds   The exterior derivative $d \theta$ of the Lee form $\theta$ of almost
Hermitian manifolds is studied. If $\omega$ is the K\"ahler two-form, it is
proved that the $\mathbb{R}\omega$-component of $d\theta$ is always zero.
expressions for the other components, in $[\lambda_0^{1,1}]$ and in $[[
\lambda^{2,0} ]]$, of $d\theta$ are also obtained. They are given in terms of
the intrinsic torsion. Likewise, it is described some interrelations between
the Lee form and $U(n)$-components of the Riemannian curvature tensor.

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The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph