Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Realization of q-deformed spacetime as star product by a Drinfeld twist   Covariance ties the noncommutative deformation of a space into a quantum
space closely to the deformation of the symmetry into a quantum symmetry.
Quantum deformations of enveloping algebras are governed by Drinfeld twists,
inner automorphisms which relate the deformed to the undeformed coproduct.
While Drinfeld twists naturally define a covariant star product on the space
algebra, this product is in general not associative and does not yield a
quantum space. It is reported that, nevertheless, there are certain Drinfeld
twists which realize the quantum plane, quantum Euclidean 4-space, and quantum
Minkowski space.

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The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph