Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetric ordering and Weyl realizations for quantum Minkowski spaces   Symmetric ordering and Weyl realizations for non commutative quantum
Minkowski spaces are reviewed. Weyl realizations of Lie deformed spaces and
corresponding star products, as well as twist corresponding to Weyl realization
and coproduct of momenta are presented. Drinfeld twists understood in Hopf
algebroid sense are also discussed. A few examples of corresponding Weyl
realizations are given. We show that for the original Snyder space there exists
symmetric ordering, but no Weyl realization. Quadratic deformations of
Minkowski space are considered and it is demonstrated that symmetric ordering
is deformed and a generalized Weyl realization can be defined.

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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas