Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theoretical Uncertainties in Inflationary Predictions   With present and future observations becoming of higher and higher quality,
it is timely and necessary to investigate the most significant theoretical
uncertainties in the predictions of inflation. We show that our ignorance of
the entire history of the Universe, including the physics of reheating after
inflation, translates to considerable errors in observationally relevant
parameters. Using the inflationary flow formalism, we estimate that for a
spectral index $n$ and tensor/scalar ratio $r$ in the region favored by current
observational constraints, the theoretical errors are of order $\Delta n / | n
- 1| \sim 0.1 - 1$ and $\Delta r /r \sim 0.1 - 1$. These errors represent the
dominant theoretical uncertainties in the predictions of inflation, and are
generically of the order of or larger than the projected uncertainties in
future precision measurements of the Cosmic Microwave Background. We also show
that the lowest-order classification of models into small field, large field,
and hybrid breaks down when higher order corrections to the dynamics are
included. Models can flow from one region to another.

35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph