Results 21 to 30 of about 51 (51)

Crouzeix's conjecture, compressions of shifts, and classes of nilpotent matrices

open access: yesConcrete Operators
This article studies the level set Crouzeix (LSC) conjecture, which is a weak version of Crouzeix’s conjecture that applies to finite compressions of the shift.
Bickel Kelly   +4 more
doaj   +1 more source

Operators with numerical range in a closed halfplane

open access: yes, 2008
Various characterizations are given of real and complex Hilbert space operators with the numerical range in a closed halfplane. Key words: Numerical range, pairs of selfadjoint operators. Mathematics Subject Classification 2000: 47A12.
Chi-kwong Li   +2 more
core  

Calculation Of Pseudospectra By The Arnoldi Iteration

open access: yes, 1996
. The Arnoldi iteration, usually viewed as a method for calculating eigenvalues, can also be used to estimate pseudospectra. This possibility may be of practical importance, for in applications involving highly non-normal matrices or operators, such as ...
Lloyd N. Trefethen, Kim-Chuan Toh, Lloyd
core  

A three monoclonal antibody combination potently neutralizes multiple botulinum neurotoxin serotype F subtypes. [PDF]

open access: yesPLoS One, 2017
Fan Y   +8 more
europepmc   +1 more source

Genetic aberrations in glioblastoma multiforme: translocation of chromosome 10 in an O-2A-like cell line. [PDF]

open access: yesBr J Cancer, 1999
Mao X   +9 more
europepmc   +1 more source

The higher rank numerical range of nonnegative matrices

open access: yesOpen Mathematics, 2013
Aretaki Aikaterini, Maroulas Ioannis
doaj   +1 more source

The Double-Layer Potential for Spectral Constants Revisited. [PDF]

open access: yesIntegr Equ Oper Theory
Schwenninger FL, de Vries J.
europepmc   +1 more source

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