Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Christensen-Wang bounds for the ghost number of a p-group algebra   Christensen and Wang give conjectural upper and lower bounds for the ghost
number of the group algebra of a p-group. We apply results of Koshitani and
Motose on the nilpotency index of the Jacobson radical to prove the upper bound
and most cases of the lower bound.

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The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: hep-lat