caa a22 4500 388092378 CHVBK 20180307125255.0 cr unu---uuuuu 161130e199904 xx s 000 0 eng 10.1017/S000497270003286X doi S000497270003286X pii (NATIONALLICENCE)cambridge-10.1017/S000497270003286X Toral automorphisms and antiautomorphisms of rotation algebras [Elektronische Daten] If U, V are the generators of a rational or irrational rotation C*-algebra then an automorphism φ of the algebra is determined by φ(U) = λUaVc and φ(V) = μUbVd where λ, μ are complex numbers of modulus 1 and a, b, c, d are integers with ad − bc = 1. If ad − bc = −1, then these formulae determine an antiautomorphsm of the algebra. The classification of such automorphisms and antiautomorphisms up to conjugacy by arbitrary automorphisms is studied and an almost complete classification is obtained. Copyright © Australian Mathematical Society 1999 Yaohua Hu School of Mathematics, La Trobe University, Bundoora Vic 3083, Australia e-mail: matyh@lure.latrobe.edu.au Stacey P.J. School of Mathematics, La Trobe University, Bundoora Vic 3083, Australia e-mail: P.Stacey@latrobe.edu.au Bulletin of the Australian Mathematical Society Cambridge University Press 59/2(1999-04), 247-255 0004-9727 59:2<247 1999 59 BAZ https://doi.org/10.1017/S000497270003286X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S000497270003286X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yaohua Hu School of Mathematics, La Trobe University, Bundoora Vic 3083, Australia e-mail: matyh@lure.latrobe.edu.au NATIONALLICENCE 700 1- Stacey P.J. School of Mathematics, La Trobe University, Bundoora Vic 3083, Australia e-mail: P.Stacey@latrobe.edu.au NATIONALLICENCE 773 0- Bulletin of the Australian Mathematical Society Cambridge University Press 59/2(1999-04), 247-255 0004-9727 59:2<247 1999 59 BAZ CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge