Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Anzellotti-Gauss-Green formula and least gradient functions in
  metric measure spaces   In the framework of the first-order differential structure introduced by
Gigli, we obtain a Gauss-Green formula on regular bounded open sets of metric
measure spaces, valid for BV functions and vector fields with integrable
divergence. Then, we study least gradient functions in metric measure spaces
using this formula as the main tool.

27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn