Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simultaneous baldness and cosmic baldness and Kottler spacetime   The uniqueness of the Kottler/Schwarzschild-de Sitter solution of the vacuum
Einstein equations with positive cosmological constant is discussed and certain
putative alternatives are shown to either solve different equations or to be
the KSdS solution in disguise. A simultaneous no-hair and cosmic no-hair
theorem for the KSdS geometry in the presence of an imperfect fluid is proved.

35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph