Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fuzzballs in general relativity: a missed opportunity   Recently some 4d asymptotically $AdS_2 \times S^2$ regular bubbling solutions
written in terms of an arbitrary profile function has appeared in literature.
We discuss the possibility of extending these solutions to asymptotically flat
spaces, therefore building a model for an horizonless and singularity-free
fuzzball with the same asymptotic charges of the associated black hole,
directly in general relativity. A negative conclusion is reached within an
axial-symmetric ansatz inside the IWP family.

28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat