Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetric chain decompositions of B_n and Pi_n   We review the Green/Kleitman/Leeb interpretation of de Bruijn's symmetric
chain decomposition of ${\cal B}_{n}$, and explain how it can be used to find a
maximal collection of disjoint symmetric chains in the nonsymmetric lattice of
partitions of a set.

23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph