Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimal Packing Behavior of some 2-block Patterns   In this paper, a result of Albert, Atkinson, Handley, Holton, and Stromquist
[Electron. J. Combin. 9 (2002), #R5] which characterizes the optimal packing
behavior of the pattern 1243 is generalized in two directions. The packing
densities of layered patterns of type (1^a,a) and (1,1,b) are computed.

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The categories of this paper are: eess
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The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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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: nucl-ex
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas