Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The universality class of absorbing phase transitions with a conserved
  field   We investigate the critical behavior of systems exhibiting a continuous
absorbing phase transition in the presence of a conserved field coupled to the
order parameter. The results obtained point out the existence of a new
universality class of nonequilibrium phase transitions that characterizes a
vast set of systems including conserved threshold transfer processes and
stochastic sandpile models.

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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci