TY - JOUR AB - We introduce and study the universal unbounded derivation of a Fréchet algebra with fixed dense domain of definition. As an application we construct new examples of holomorphically closed subalgebras of the reduced C*-algebra of a nonabelian free group. Every trace on the group ring which is supported in finitely many conjugacy classes extends to a bounded trace on these algebras. AU - Puschnigg, Michael DA - 2009 LA - ger IS - Münster Journal of Mathematics M2 - 253 PY - 2009 SP - 253-264 T2 - Münster Journal of Mathematics TI - Die universelle beschränkte Derivation UR - https://nbn-resolving.org/urn:nbn:de:hbz:6-10569451172 Y2 - 2024-12-27T10:02:30 ER -