Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Discussion of "Functional Models for Time-Varying Random Objects'' by
  Dubey and M\"uller   The discussion focuses on metric covariance, a new association measure
between paired random objects in a metric space, developed by Dubey and
M\"uller, and on its relationship with other similar concepts which have
previously appeared in the literature, including distance covariance by
Sz\'ekely et al, as well as its generalisations which rely on the formalism of
reproducing kernel Hilbert spaces (RKHS).

27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat