Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On nearly K\"{a}hler and K\"{a}hler-Codazzi type manifolds   Nearly K\"{a}hler and K\"{a}hler-Codazzi type manifolds are defined in a very
similar way. We prove that nearly K\"{a}hler type manifolds have sense just in
Hermitian and para-Hermitian contexts, and that K\"{a}hler-Codazzi type
manifolds reduce to K\"{a}hler type manifolds in all the four Hermitian,
para-Hermitian, Norden and product Riemannian geometries.

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The categories of this paper are: patt-sol
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The categories of this paper are: eess
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
1
The categories of this paper are: cs
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat