Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Covariant multi-galileons and their generalisation   We find a covariant completion of the flat-space multi-galileon theory,
preserving second-order field equations. We then generalise this to arrive at
an enlarged class of second order theories describing multiple scalars and a
single tensor, and conjecture that these are a multi-scalar version of
Horndeski's most general scalar-tensor theory.

19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
1
The categories of this paper are: cs
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th