Regular States and the Regular Algebra Numerical Range

2019 ◽  
pp. 511-535
Author(s):  
Anton R. Schep ◽  
James Sweeney
Keyword(s):  
Numerical Range ◽  
Regular Algebra

A new method for approximation of closed convex subsets of B(H)

Filomat ◽  
2017 ◽  
Vol 31 (19) ◽  
pp. 6005-6013
Author(s):  
Mahdi Iranmanesh ◽  
Fatemeh Soleimany
Keyword(s):  
Best Approximation ◽  
Numerical Range ◽  
New Method ◽  
C Algebra ◽  
Convex Subsets

In this paper we use the concept of numerical range to characterize best approximation points in closed convex subsets of B(H): Finally by using this method we give also a useful characterization of best approximation in closed convex subsets of a C*-algebra A.

Continuity of submatrices and Ritz sets associated to a point in the numerical range

2021 ◽  
Vol 624 ◽  
pp. 1-13
Author(s):  
Kennett L. Dela Rosa ◽  
Hugo J. Woerdeman
Keyword(s):  
Numerical Range

a-Numerical range on $$C^*$$-algebras

Positivity ◽  
2021 ◽  
Author(s):  
Abdellatif Bourhim ◽  
Mohamed Mabrouk
Keyword(s):  
Numerical Range ◽  
C Algebras

On the maximal numerical range of the bimultiplication M2,A,B

2021 ◽  
pp. 1-8
Author(s):  
Abderrahim Baghdad ◽  
Chraibi Kaadoud Mohamed
Keyword(s):  
Numerical Range

scholarly journals $L$-ideals and numerical range preservation

1977 ◽  
Vol 21 (2) ◽  
pp. 365-373 ◽  
Author(s):  
C. K. Chui ◽  
P. W. Smith ◽  
R. R. Smith ◽  
J. D. Ward
Keyword(s):  
Numerical Range

NUMERICAL RANGE OF OPERATORS AND STRUCTURE IN BANACH SPACES

1982 ◽  
Vol 33 (3) ◽  
pp. 357-364 ◽  
Author(s):  
R. PAYÁ-ALBERT
Keyword(s):  
Banach Spaces ◽  
Numerical Range

Crouzeix's Conjecture Holds for Tridiagonal 3 x 3 Matrices with Elliptic Numerical Range Centered at an Eigenvalue

2018 ◽  
Vol 39 (1) ◽  
pp. 346-364 ◽  
Author(s):  
Christer Glader ◽  
Mikael Kurula ◽  
Mikael Lindström
Keyword(s):  
Numerical Range

Regular Algebra Applied to Path-finding Problems

1975 ◽  
Vol 15 (2) ◽  
pp. 161-186 ◽  
Author(s):  
R. C. BACKHOUSE ◽  
B. A. CARRÉ
Keyword(s):  
Path Finding ◽  
Regular Algebra
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