Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards wormhole beyond Horndeski   We address the issue of whether a no-go theorem for static, spherically
symmetric wormholes, proven in Horndeski theories, can be circumvented by going
beyond Horndeski. We show that the ghost instabilities which are at the heart
of the no-go theorem, can indeed be avoided. The wormhole solutions with the
latter property are, however, strongly fine tuned, and hence it is likely that
they are unstable. Furthermore, it remains unclear whether these solutions have
other pathologies, like gradient instabilities along angular and radial
directions.

36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int