Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hypercomplex structures on Courant algebroids   Hypercomplex structures on Courant algebroids unify holomorphic symplectic
structures and usual hypercomplex structures. In this note, we prove the
equivalence of two characterizations of hypercomplex structures on Courant
algebroids, one in terms of Nijenhuis concomitants and the other in terms of
(almost) torsionfree connections for which each of the three complex structures
is parallel.

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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph