Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A local method for posets   We propose some conditions on a poset that produce a small chain complex for
its homology. This allows to compare simplicial complexes and Quillen's
complexes under the same prism. It turns out they differ in the existence or
not of free faces in an acyclic complex.

34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int