Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the geometry of cosmological model building   This article analyzes the present anomalies of cosmology from the point of
view of integrable Weyl geometry. It uses P.A.M. Dirac's proposal for a weak
extension of general relativity, with some small adaptations. Simple models
with interesting geometrical and physical properties, not belonging to the
Friedmann-Lema\^{\i}tre class, are studied in this frame. Those with positive
spatial curvature (Einstein-Weyl universes) go well together with observed mass
density $\Omega_m$, CMB, supernovae Ia data, and quasar frequencies. They
suggest a physical role for an equilibrium state of the Maxwell field proposed
by I.E. Segal in the 1980s (Segal background) and for a time invariant
balancing condition of vacuum energy density. The latter leads to a surprising
agreement with the BF-theoretical calculation proposed by C. Castro (2002).

22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an