Using standard results from higher (secondary) index theory, we prove that
the positive scalar curvature bordism groups of a cartesian product GxZ are
infinite in dimension 4n if n>0 G a group with non-trivial torsion. We
construct representatives of each of these classes which are connected and with
fundamental group GxZ. We get the same result in dimension 4n+2 (n>0) if G is
finite and contains an element which is not conjugate to its inverse. This
generalizes the main result of Kazaras, Ruberman, Saveliev, "On positive scalar
curvature cobordism and the conformal Laplacian on end-periodic manifolds" to
arbitrary even dimensions and arbitrary groups with torsion.Comment: 7 pages. v2 corrected typos, added references and more details of
some proofs and constructions, following suggestions of referees. To appear
in Communications in Analysis and Geometr