Add to ORKGAbstract. Let A and B be commuting bounded linear operators on a Hilbert space. In this paper, we study spectral area estimates for norms of A∗B − BA ∗ when A is subnormal or p-hyponormal. 2 Let H be a Hilbert space and B(H) the set of all bounded linear operators on H. If T is a hyponormal operator in B(H) then C.R.Putnam [7] proved that ‖ T ∗T −TT ∗ ‖≤ Area(σ(T))/pi where σ(T) is the spectrum of T. The second named author [5] has prove
AbstractWe prove that quasisimilar subdecomposable operators have equal spectra and quasisimilar sub...
Let A be a bounded linear operator on a Hilbert space H; denote |A| = (A∗A)12and the norm of x ϵ H b...
A bounded linear operator $A$ on a Hilbert space $\mathcal{H}$ is posinormal if there exists a posit...
Let $A$ and $B$ be commuting bounded linear operators on a Hilbert space. In this paper, we study sp...
We find estimates on the norm of a commutator of the form [f(x),y] in terms of the norm of [x,y], as...
Abstract. In this paper an easier proof is obtained of Alexandru Aleman’s extension of an inequality...
We extend the theory of determining functions to the con-text of hyponormal operators without requir...
Let X be a Banach space and L(X) be the Banach algebra of bounded operators on X. In this note we pr...
\begin{abstract} We find estimates on the norm of a commutator of the form $[f(x),y]$ in terms of ...
Matlab code used to create test data in "Estimating norms of commutators."\begin{abstract} We find ...
Let $H $ be acomplex Hilbert space and let $\mathcal{B}(H) $ denote the Banach algebra of all (bound...
Abstract. We prove that limp→ ∞ ‖f‖p+1p+1 / ‖f‖pp = ‖f‖ ∞ for f 6 = 0 in the Bochner space L∞E (μ), ...
Let H be a complex Hilbert space and let L(H) be the algebra of all bounded linear operators on H. F...
AbstractWe prove that quasisimilar subdecomposable operators have equal spectra and quasisimilar sub...
We prove a generalization to p-hyponormal operators of Berger's and Shaw's estimate for th...
AbstractWe prove that quasisimilar subdecomposable operators have equal spectra and quasisimilar sub...
Let A be a bounded linear operator on a Hilbert space H; denote |A| = (A∗A)12and the norm of x ϵ H b...
A bounded linear operator $A$ on a Hilbert space $\mathcal{H}$ is posinormal if there exists a posit...
Let $A$ and $B$ be commuting bounded linear operators on a Hilbert space. In this paper, we study sp...
We find estimates on the norm of a commutator of the form [f(x),y] in terms of the norm of [x,y], as...
Abstract. In this paper an easier proof is obtained of Alexandru Aleman’s extension of an inequality...
We extend the theory of determining functions to the con-text of hyponormal operators without requir...
Let X be a Banach space and L(X) be the Banach algebra of bounded operators on X. In this note we pr...
\begin{abstract} We find estimates on the norm of a commutator of the form $[f(x),y]$ in terms of ...
Matlab code used to create test data in "Estimating norms of commutators."\begin{abstract} We find ...
Let $H $ be acomplex Hilbert space and let $\mathcal{B}(H) $ denote the Banach algebra of all (bound...
Abstract. We prove that limp→ ∞ ‖f‖p+1p+1 / ‖f‖pp = ‖f‖ ∞ for f 6 = 0 in the Bochner space L∞E (μ), ...
Let H be a complex Hilbert space and let L(H) be the algebra of all bounded linear operators on H. F...
AbstractWe prove that quasisimilar subdecomposable operators have equal spectra and quasisimilar sub...
We prove a generalization to p-hyponormal operators of Berger's and Shaw's estimate for th...
AbstractWe prove that quasisimilar subdecomposable operators have equal spectra and quasisimilar sub...
Let A be a bounded linear operator on a Hilbert space H; denote |A| = (A∗A)12and the norm of x ϵ H b...
A bounded linear operator $A$ on a Hilbert space $\mathcal{H}$ is posinormal if there exists a posit...