A von Neumann type inequality for an annulus
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DOI: 10.1016/j.jmaa.2021.125714
Abstract: Let Ar = {r < |z| < 1} be an annulus. We consider the class of operators Fr := {T ∈ B(H) : rT(T) + TT ∗ ≤ r2 + 1, σ(T ) ⊂ Ar}… read more here.
Keywords: type inequality; neumann type; inequality annulus; von neumann ... See more keywords
Neumann Type Integrable Reduction to the Negative-Order Coupled Harry–Dym Hierarchy
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DOI: 10.7566/jpsj.87.104004
Abstract: Based on the Lax compatibility, the negative-order coupled Harry--Dym (ncHD) hierarchy depending upon one parameter $\alpha$ is retrieved in the Lenard scheme, which includes the two-component Camassa--Holm (2CH) equation as a special member with $\alpha=-\frac14$.… read more here.
Keywords: order coupled; coupled harry; neumann type; hierarchy ... See more keywords