Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On aggregation of multitype Galton-Watson branching processes with
  immigration   Limit behaviour of temporal and contemporaneous aggregations of independent
copies of a stationary multitype Galton-Watson branching process with
immigration is studied in the so-called iterated and simultaneous cases,
respectively. In both cases, the limit process is a zero mean Brownian motion
with the same covariance function under third order moment conditions on the
branching and immigration distributions. We specialize our results for
generalized integer-valued autoregressive processes and single-type
Galton-Watson processes with immigration as well.

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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: hep-lat