Equivalent between the Criterion and the Three Open Set's Conditions in Disk-Cyclicity
Hypercyclic operators
Disk- Cyclic operators
Disk- Cyclic vectors.
A vector in a separable infinite dimensional Hilbert space is called disk-cyclic for bounded operator if the orbit α : 0, α∈;|∝| 1is dense in. The useful tool used to discover codisk-cyclic operation is called the disk-cyclic Criterion. In this paper we will show that some equivalent conditions of the
