Operator Theory, Operator Algebras, and Matrix Theory

Indecomposable supercharacters of the infinite unitriangular group.- A nonlocal C*-algebra of singular integral operators with shifts and piecewise quasicontinuous coefficients.- Non-Hermitian quantum mechanics of bosonic operators.- Fredholm conditions on non-compact manifolds: theory and examples.- Statistical e-Convergence of Bögel-Type Continuous Functions.- Weighted statistical relative approximation by positive linear operators.- Descriptor systems under feedback and output injection.- Hermitian geometry on resolvent set (I).- Spectral algorithms for MRA orthonormal wavelets.- The NIEP.- Semi-Fredholmness of Weighted Singular Integral Operators with Shifts and Slowly Oscillating Data.- Factorization of singular integral operators with a Carleman backward shift: the vector case.- Extension-restriction theorems for algebras of approximation sequences.- Toeplitz and Hankel algebras - axiomatic and asymptotic aspects.- More than 40 years of algebraic techniquesin Numerical Analysis.- Linearizability of multi-control systems of the class C1 by additive change of controls.- The distance formula related to a family of projections orthogonal to their symmetries.