Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on the foundation of relativistic mechanics. I: Relativistic
  observables and relativistic states   Is there a version of the notions of "state" and "observable" wide enough to
apply naturally and in a covariant manner to relativistic systems? I discuss
here a tentative answer.

14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol