Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Infinite Hierarchical MMSB Model for Nested Communities/Groups in Social
  Networks   Actors in realistic social networks play not one but a number of diverse
roles depending on whom they interact with, and a large number of such
role-specific interactions collectively determine social communities and their
organizations. Methods for analyzing social networks should capture these
multi-faceted role-specific interactions, and, more interestingly, discover the
latent organization or hierarchy of social communities. We propose a
hierarchical Mixed Membership Stochastic Blockmodel to model the generation of
hierarchies in social communities, selective membership of actors to subsets of
these communities, and the resultant networks due to within- and
cross-community interactions. Furthermore, to automatically discover these
latent structures from social networks, we develop a Gibbs sampling algorithm
for our model. We conduct extensive validation of our model using synthetic
networks, and demonstrate the utility of our model in real-world datasets such
as predator-prey networks and citation networks.

35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex