Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A criterion for the triviality of non-steady gradient Ricci solitons   The main purpose of this paper is to show that a normalized non-steady
gradient Ricci soliton (M,g,f,{\lambda}) of dimension n is trivial if and only
if its scalar curvature S satisfies the equality S={\lambda}(f+(n/2)).

17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th