Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Torsion, an alternative to the cosmological constant?   We confront Einstein-Cartan's theory with the Hubble diagram and obtain a
negative answer to the question in the title. Contrary findings in the
literature seem to stem from an error in the field equations.

25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph