Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Cosmological Constant and the Deconstruction of Gravity   Witten has presented an argument for the vanishing of the cosmological
constant in 2+1 dimensions. This argument is crucially tied to the specific
properties of (2+1)-dimensional gravity. We argue that this reasoning can be
deconstructed to 3+1 dimensions under certain conditions. Our observation is
also tied to a possibility that there exists a well-defined UV completion of
(3+1)-dimensional gravity.

10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol