47A12

Articles containing subject class 47A12:

OaM-01-24 » Higher-rank numerical ranges of unitary and normal matrices (09/2007)
OaM-02-08 » Numerical Radius Inequalities for Square-zero and Idempotent Operators (03/2008)
OaM-02-16 » Higher-rank numerical range in infinite-dimensional Hilbert space (06/2008)
OaM-02-20 » Davis-Wielandt shells of operators (09/2008)
JMI-02-45 » Norm and numerical radius inequalities for a product of two linear operators in Hilbert spaces (12/2008)
JMI-03-01 » Q-norm inequalities for sequences of Hilbert space operators (03/2009)
OaM-03-21 » Essentially hermitian matrices and inclusion relations of C-numerical ranges (09/2009)
JMI-03-35 » Characterization of the norm triangle equality in pre-Hilbert C-modules and applications (09/2009)
OaM-04-05 » On operators with large self-commutators (03/2010)
OaM-04-14 » Operator radii and unitary operators (06/2010)
OaM-06-09 » Maps preserving peripheral spectrum of Jordan products of operators (03/2012)
OaM-06-41 » The possible shapes of numerical ranges (09/2012)
OaM-07-11 » The numerical radii of weighted shift matrices and operators (03/2013)
OaM-07-16 » Numerical radius and distance from unitary operators (06/2013)
MIA-16-52 » Unitarily invariant norms related to the numerical radius on B(H) (07/2013)
OaM-07-47 » Normal matrix compressions (12/2013)
OaM-07-48 » Matrices with defect index one (12/2013)
OaM-08-39 » Pre-images of boundary points of the numerical range (09/2014)
OaM-08-51 » The block numerical range of analytic operator functions (12/2014)
OaM-09-04 » Algebraic properties of the set of operators with 0 in the closure of the numerical range (03/2015)
OaM-09-19 » C-envelopes of Jordan operator systems (06/2015)
MIA-18-68 » Numerical radius inequalities associated with the Cartesian decomposition (07/2015)
OaM-09-32 » An observation concerning boundary points of the numerical range (09/2015)
MIA-19-47 » A Fiedler-type theorem for the determinant of J-positive matrices (04/2016)
OaM-10-36 » The correlation numerical range and trace-positive complex polynomials (09/2016)
OaM-10-45 » The trace as an average over the unit sphere of a normed space with a 1-symmetric basis (09/2016)
OaM-10-58 » Pre-images of extreme points of the numerical range, and applications (12/2016)
JMI-10-83 » Numerical radius inequalities for Hilbert space operators (12/2016)
OaM-11-12 » Numerical ranges of the product of operators (03/2017)
OaM-11-15 » On the normalized numerical range (03/2017)
OaM-11-18 » Pseudospectrum of an element of a Banach algebra (03/2017)
OaM-11-51 » Spectral sets for numerical range (09/2017)
OaM-11-62 » An observation about normaloid operators (09/2017)
OaM-12-15 » On the block numerical range of operators on arbitrary Banach spaces (03/2018)
OaM-12-16 » Scalar approximants of quadratic operators with applications (03/2018)
JMI-12-19 » Maximal numerical range of a compact set and applications to some Dragomir's inequalities (03/2018)
OaM-12-26 » Sharpening some classical numerical radius inequalities (06/2018)
JMI-12-33 » Some generalizations of numerical radius on off-diagonal part of 2 × 2 operator matrices (06/2018)