Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Torsion Obstructions to Positive Scalar Curvature   We exhibit new examples of manifolds which admit {\it no metrics with
positive scalar curvatures} and such that products of such manifolds admit such
metrics.

31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex