Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Solution of the Relativistic Schr\"odinger Equation for the
  $\delta$-Function Potential in 1-dimensiona with Cutoff Regularization   We study the solution of the relativistic Schr\"odinger equation for a point
particle in 1-d under $\delta$-function potential by using cutoff
regularization. We show that the problem is renormalizable, and the results are
exactly the same as the ones obtained using dimensional regularization.

32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn