Publisher
Springer Science and Business Media LLC
Reference13 articles.
1. Apostol C. The correction by compact perturbation of the singular behavior of operators. Rev Roumaine Math Pures Appl, 1976, 21: 155–175
2. Research Notes in Mathematics;C. Apostol,1984
3. Atkinson F V. The normal solubility of linear equations in normed spaces. Mat Sb (N.S.), 1951, 28: 3–14
4. Berg I D. An extension of the Weyl-von Neumann theorem to normal operators. Trans Amer Math Soc, 1971, 160: 365–371
5. Berg I D, Davidson K R. Almost commuting matrices and a quantitative version of the Brown-Douglas-Fillmore theorem. Acta Math, 1991, 166: 121–161