Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A linearized kinetic problem on the half-line with collision operator
  from a Bose condensate with excitations   The paper studies a Milne type problem for a linearized quantum Boltzmann
equation. Existence and uniqueness of the solution, together with asymptotic
properties are proven for a given energy flow. The energy flow is proportional
to the asymptotic limit of the mass flow, and the collision frequency is
aymptoticlaly cubic in velocity. The setting differs from the one for the
classical Boltzmann and related equations, where the fluid-dynamic mass flow
along half-line is constant. Here it is no more constant. Instead the study is
based on the energy flow which is no more fluid-dynamic, and on the entropy
flow which differs from the classical case.

17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th