Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Differential operators on non-commutative algebras   There is a relatively well-known description of the algebra of (higher order)
left differential operators on commutative algebras. This note gives a
construction of similar flavor for algebras of differential operators on not
necessarily commutative algebras.

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The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn