Article contents
Frequent universality criterion and densities
Published online by Cambridge University Press: 25 November 2019
Abstract
We improve a recent result by giving the optimal conclusion both to the frequent universality criterion and the frequent hypercyclicity criterion using the notion of $A$-densities, where $A$ refers to some weighted densities sharper than the natural lower density. Moreover, we construct an operator which is logarithmically frequently hypercyclic but not frequently hypercyclic.
MSC classification
- Type
- Original Article
- Information
- Copyright
- © Cambridge University Press, 2019
References
- 4
- Cited by