2011/09/23 by Thomsen, Klaus
#FOS: Mathematics #Operator Algebras (math.OA)
paper · doi:10.48550/arxiv.1109.5031
The complex exponential function is a local homeomorphism and gives therefore rise to an 'etale groupoid and a C*-algebra. We determine this algebra, as well as the alge bra of the complex conjugate of the exponential function.