Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Regularity for diffuse reflection boundary problem to the stationary
  linearized Boltzmann equation in a convex domain   We investigate the regularity issue for the diffuse reflection boundary
problem to the stationary linearized Boltzmann equation for hard sphere
potential, cutoff hard potential, or cutoff Maxwellian molecular gases in a
strictly convex bounded domain. We obtain pointwise estimates for first
derivatives of the solution provided the boundary temperature is bounded
differentiable and the solution is bounded. This result can be understood as a
stationary version of the velocity averaging lemma and mixture lemma.

20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int