Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: MC2G: An Efficient Algorithm for Matrix Completion with Social and Item
  Similarity Graphs   In this paper, we design and analyze MC2G (Matrix Completion with 2 Graphs),
an algorithm that performs matrix completion in the presence of social and item
similarity graphs. MC2G runs in quasilinear time and is parameter free. It is
based on spectral clustering and local refinement steps. The expected number of
sampled entries required for MC2G to succeed (i.e., recover the clusters in the
graphs and complete the matrix) matches an information-theoretic lower bound up
to a constant factor for a wide range of parameters. We show via extensive
experiments on both synthetic and real datasets that MC2G outperforms other
state-of-the-art matrix completion algorithms that leverage graph side
information.

25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex