Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Global existence and uniqueness of solutions to a model of price
  formation   We study a model due to J.M. Lasry and P.L. Lions, describing the evolution
of a scalar price which is realized as a free boundary in a 1-D diffusion
equation with dynamically evolving, non-standard sources. We establish global
existence and uniqueness.

5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess