@article {2014,
title = {Pimsner algebras and Gysin sequences from principal circle actions},
year = {2014},
note = {The preprint is composed of 30 pages and recorded in PDF format. Was published in arXiv},
abstract = {A self Morita equivalence over an algebra B, given by a B-bimodule E, is thought of as a line bundle over B. The corresponding Pimsner algebra O_E is then the total space algebra of a noncommutative principal circle bundle over B. A natural Gysin-like sequence relates the KK-theories of O_E and of B. Interesting examples come from O_E a quantum lens space over B a quantum weighted projective line (with arbitrary weights). The KK-theory of these spaces is explicitly computed and natural generators are exhibited.},
url = {http://urania.sissa.it/xmlui/handle/1963/34461},
author = {Francesca Arici and Jens Kaad and Giovanni Landi}
}