Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hochschild and cyclic homology of preprojective algebras of ADE quivers   We calculate the additive structure (together with the grading) of the
Hochschild homology and cohomology and the cyclic homology of preprojective
algebras of types ADE.

3
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: eess
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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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: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg