Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A scaling proof for Walsh's Brownian motion extended arc-sine law   We present a new proof of the extended arc-sine law related to Walsh's
Brownian motion, known also as Brownian spider. The main argument mimics the
scaling property used previously, in particular by D. Williams in the
1-dimensional Brownian case, which can be generalized to the multivariate case.
A discussion concerning the time spent positive by a skew Bessel process is
also presented.

28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org