Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the definiteness of associated energy-momentum tensors to a class of
  general variation problems   We show the point-wise definiteness and some other properties of the
energy-momentum tensor for a certain class of Euler-Lagrange equations under
quite general conditions.

32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess