Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A comment on the paper "Deformed Boost Transformations that saturate at
  the Planck Scale" by N.B.Bruno,G.Amelino-Camelia, and J.Kowalski-Glikman   An alternative (simplified) derivation of the dispersion relation and the
expressions for the momentum-energy 4-vector $p_i,p_0$ given initially in [1]
is provided. It has turned out that in a rather "pedestrian" manner one can
obtain in one stroke not only the above relations but also the correct
dispersion relation in $\omega-k_i$ space, consistent with the value of a
velocity of a massless particle. This is achieved by considering the standard
Lorentz algebra for $\omega-k_i$-space. A non-uniqueness of the choice of the
time-derivative in the presence of the finite length scale is discussed. It is
shown that such non-uniqueness does not affect the dispersion relation in
$\omega-k_i$-space. albeit results in different dispersion relations in
$p-p_0$-space depending on the choice of the definition of the time derivative.

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The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol