Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improving Physical Cosmology: An Empiricist's Assessment   The $\Lambda$CDM cosmology passes demanding tests that establish it as a good
approximation to reality, but it could be improved. I present a list of
possibly interesting and less well explored things that might yield hints to a
better theory.

16
The categories of this paper are: stat
2
The categories of this paper are: math
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin