Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Progresses and Challenges in Link Prediction   Link prediction is a paradigmatic problem in network science, which aims at
estimating the existence likelihoods of nonobserved links, based on known
topology. After a brief introduction of the standard problem and metrics of
link prediction, this Perspective will summarize representative progresses
about local similarity indices, link predictability, network embedding, matrix
completion, ensemble learning and others, mainly extracted from thousands of
related publications in the last decade. Finally, this Perspective will outline
some long-standing challenges for future studies.

34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph