Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gauge invariant fluctuations of the metric during inflation from new
  scalar-tensor Weyl-Integrable gravity model   We investigate gauge invariant scalar fluctuations of the metric during
inflation in a non-perturbative formalism in the framework of a recently
introduced scalar-tensor theory of gravity formulated on a Weyl-Integrable
geometry. We found that the Weyl scalar field can play the role of the inflaton
field in this theory. As an application we study the case of a power law
inflation. In this case the quasi-scale invariance of the spectrum for scalar
fluctuations of the metric is achieved for determined values of the $\omega$
parameter of the scalar-tensor theory. In our formalism the physical inflaton
field has a geometrical origin.

29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys