Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mechanical properties of particles   Selected topics related to the physics of the energy-momentum tensor (EMT)
form factors are discussed. The topics are: 1) Fundamental mechanical
properties of particles and gravity 2) Mechanical properties of non-spherical
particles 3) Gravitational form factors of Goldstone bosons 4) Nucleon's
seismology?

30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph