Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativity and quantum mechanics: Jorgensen revisited   We first define the functions which ensure the transformation of momentum and
energy of a tardyon, the transformation of the wave vector and the frequency of
the associated wave. Having done this, we show that they ensure the
relativistic invariance of the quotient between momentum and wave vector and
between energy and frequency if the product between particle velocity u and
phase velocity w is a relativistic invariant (uw=c^2), a condition which is a
natural combination of special relativity theory and quantum mechanics.

35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int