Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DIFFUSION IN ONE DIMENSIONAL RANDOM MEDIUM AND HYPERBOLIC BROWNIAN
  MOTION   Classical diffusion in a random medium involves an exponential functional of
Brownian motion. This functional also appears in the study of Brownian
diffusion on a Riemann surface of constant negative curvature. We analyse in
detail this relationship and study various distributions using stochastic
calculus and functional integration.

34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th