The Quarterly Journal of Mathematics 2004 55(3):325-331; doi:10.1093/qmath/hah001
© 2004 by Oxford University Press
Paschke duality for real and graded C-algebras
John Roe1
1 Department of Mathematics, Penn State University, University Park, PA 16802, USA
Shortly after Brown, Douglas and Fillmore introduced their interpretation of K-homology, it was pointed out by Paschke that the BDF groups are in fact the K-theory groups of a certain essential commutant algebra. This note describes a version of this construction which is appropriate for real and/or graded C*-algebras.
Received 15 September 2003.

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