Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 5-Dimensional $SO(1, 4)$-Invariant Action as an Origin to the
  Magueijo-Smolin Doubly Special Relativity Proposal   In this paper we discuss how the Magueijo-Smolin Doubly Special Relativity
proposal may obtained from a singular Lagrangian action. The deformed
energy-momentum dispersion relation rises as a particular gauge, whose
covariance imposes the non-linear Lorentz group action. Moreover, the
additional invariant scale is present from the beginning as a coupling constant
to a gauge auxiliary variable. The geometrical meaning of the gauge fixing
procedure and its connection to the free relativistic particle are also
described.

2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin