نتایج جستجو برای: pick
تعداد نتایج: 11939 فیلتر نتایج به سال:
Abstract Based on the recently proven Khavinson conjecture, we establish an inequality of Schwarz–Pick type for harmonic functions unit ball $\mathbb{R}^n$.
We examine densely defined (but possibly unbounded) multiplication operators in Hilbert function spaces possessing a complete Nevanlinna–Pick (CNP) kernel. For such operator T, the domains of T and \(T^*\) are reproducing kernel contractively contained ambient space. study several aspects these spaces, especially domain \(T^*\), which can be viewed as analogs classical deBranges–Rovnyak unit di...
Let H be the Drury-Arveson or Dirichlet space of unit ball Cd. The weak product ? is collection all functions h that can written as =??n=1 fngn, where ??n=1 ||fn|| ||gn|| < ?. We show contained in Smirnov class H; is, every function a quotient two multipliers H, denominator chosen to cyclic . As consequence, we map N ? closH ?H establishes one-to-one and onto correspondence between multiplier i...
A class is studied of complex valued functions defined on the unit disk (with a possible exception of a discrete set) with the property that all their Pick matrices have not more than a prescribed number of negative eigenvalues. Functions in this class, known to appear as pseudomultipliers of the Hardy space, are characterized in several other ways. It turns out that a typical function in the c...
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