Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universal Effective Quantum Number for Centrally Symmetric Problems   An effective quantum number determining with high accuracy the levels
ordering in arbitrary centrally symmetric potentials for any space
dimensionality is introduced and calculated by means of certain universal
methods based on the known estimates for the total number of the bound states
in the same potential for various dimensionality. Coincidence with some known
exact results is demonstrated. The effective number is used for constructing
the periodical system of the atomic electron shells.

23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph