Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semi-localized axial state of a relativistic electron   The new quantum state of a relativistic electron in a vacuum is described. It
corresponds to an electron moving freely along a certain direction and being
self-localized in a plane which is transverse to its momentum. This
semi-localized state is self-consistent with respect to the interaction of an
electron with its own electromagnetic field. The width of a transverse
distribution is proved to be the Compton wavelength of an electron

0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
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
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
1
The categories of this paper are: cs