activity
20052007
most citedReconstruction of the Berger measure when the core is of tensor form

13 citations · 13 across the 4 of their papers we have counts for

collaborators

4 papers

math.FA2007★ 13 cited

Reconstruction of the Berger measure when the core is of tensor form

Raul E. Curto, Sang Hoon Lee, Jasang Yoon

Let denote the class of commuting pairs of subnormal operators on Hilbert space, and let $\mathcal{TC}:=\{\mathbf{T}\in \mathfrak{% H}_{0}:c(\mathbf{T)}$ is of t…

math.FA2006

Hyponormality and subnormality for powers of commuting pairs of subnormal operators

Raul E. Curto, Sang Hoon Lee, Jasang Yoon

Let H_0 (resp. H_\infty denote the class of commuting pairs of subnormal operators on Hilbert space (resp. subnormal pairs), and for an integer k>=1 let H_k denote the class of k-h…

math.FA2006

Quartically hyponormal weighted shifts need not be 3-hyponormal

Raul E. Curto, Sang Hoon Lee

We give the first example of a quartically hyponormal unilateral weighted shift which is not 3-hyponormal.

math.FA2005

k-hyponormality of multivariable weighted shifts

Raul E. Curto, Sang Hoon Lee, Jasang Yoon

We characterize joint k-hyponormality for 2-variable weighted shifts. Using this characterization we construct a family of examples which establishes and illustrates the gap betwee…