Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cucker-Smale Flocking Under Hierarchical Leadership and Random
  Interactions   Consider a flock of birds that fly interacting between them. The interactions
are modelled through a hierarchical system in which each bird, at each time
step, adjusts its own velocity according to his past velocity and a weighted
mean of the relative velocities of its superiors in the hierarchy. We consider
the additional fact, that each of the birds can fail to see any of its
superiors with certain probability, that can depend on the distances between
them. For this model with random interactions we prove that the flocking
phenomena, obtained for similar deterministic models, holds true.

30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org