Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Normalized General Relativity: Non-closed Universe and Zero Cosmological
  Constant   We discuss the cosmological constant problem, at the minisuperspace level,
within the framework of the so-called normalized general relativity (NGR). We
prove that the Universe cannot be closed, and reassure that the accompanying
cosmological constant $\Lambda$ generically vanishes, at least classically. The
theory does allow, however, for a special class of $\Lambda \not=0$ solutions
which are associated with static closed Einstein universe and with
Eddington-Lema\^{\i}tre universe.

16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin