Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Forward Brownian Motion   We consider processes which have the distribution of standard Brownian motion
(in the forward direction of time) starting from random points on the
trajectory which accumulate at $-\infty$. We show that these processes do not
have to have the distribution of standard Brownian motion in the backward
direction of time, no matter which random time we take as the origin. We study
the maximum and minimum rates of growth for these processes in the backward
direction. We also address the question of which extra assumptions make one of
these processes a two-sided Brownian motion.

34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio