Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nearest neighbor Methods and their Applications in Design of 5G & Beyond
  Wireless Networks   In this paper, we present an overview of Nearest neighbor (NN) methods, which
are frequently employed for solving classification problems using supervised
learning. The article concisely introduces the theoretical background,
algorithmic, and implementation aspects along with the key applications. From
an application standpoint, this article explores the challenges related to the
5G and beyond wireless networks which can be solved using NN classification
techniques.

3
The categories of this paper are: physics
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph