Floyd gave an example of a minimal dynamical system which was extension odometer and the fibres associated factor map were either singletons or intervals. Gjerde Johansen showed that could be replaced by any Cantor system. Here, we show further intervals can generalized to cubes arbitrary dimension attractors certain iterated function systems. We discuss applications.

Introduction: Minimal disease determination might serve for risk stratification, response evaluation and follow-up monitoring in childhood Non-Hodgkin lymphomas. Besides helping to judge minimal residual (MRD) during therapy, detection of disseminated (MDD) at diagnosis may be prognostic value itself. However, different subtypes, high cure rates, low patient numbers, limited initial tumour mate...