Results 151 to 160 of about 20,701 (195)
Some of the next articles are maybe not open access.
Integral Equations and Operator Theory, 1983
This paper is a continuation of a former one [ibid. 6, 853-862 (1983; Zbl 0522.47010)]. In this one, after considering bundles of subspaces of a topological vector space, we show how they appear as image or kernel of semi-Fredholm families. We also extend some well known results of holomorphic Fredholm families to the setting of topological vector ...
Cuellar, Jorge +2 more
openaire +2 more sources
This paper is a continuation of a former one [ibid. 6, 853-862 (1983; Zbl 0522.47010)]. In this one, after considering bundles of subspaces of a topological vector space, we show how they appear as image or kernel of semi-Fredholm families. We also extend some well known results of holomorphic Fredholm families to the setting of topological vector ...
Cuellar, Jorge +2 more
openaire +2 more sources
Fredholm Weighted Generalized Composition Operators
Complex Analysis and Operator Theory, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Datt, Gopal, Jain, Mukta
openaire +2 more sources
Generalized Fredholm operators
Archiv der Mathematik, 1985The classical Fredholm theory in Banach spaces studies normally solvable operators with null space or conull space in F, the ideal of all finite dimensional Banach spaces. The aim of this paper is to study normally solvable operators with null space or conull space in an arbitrary space ideal A.
Alvarez, Teresa, Onieva, Victor M.
openaire +2 more sources
Journal of Mathematical Sciences
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +1 more source
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +1 more source
Operator Estimates for Fredholm Modules
Canadian Journal of Mathematics, 2000AbstractWe study estimates of the typewhere φ(t) = t(1 + t2)−1/2, D0 = D0* is an unbounded linear operator affiliated with a semifinite von Neumann algebra , D − D0 is a bounded self-adjoint linear operator from and , where E(, τ) is a symmetric operator space associated with .
openaire +2 more sources
1987
In this chapter a connection is established between the Fredholmness of the operator A = [A mk ] m,k=1 n in the Cartesian product E n = E × ... × E of n copies of a Banach space E and the Fredholmness of its determinant det[A mk ] in E. Conditions are given under which the indices of these two operators coincide.
openaire +1 more source
In this chapter a connection is established between the Fredholmness of the operator A = [A mk ] m,k=1 n in the Cartesian product E n = E × ... × E of n copies of a Banach space E and the Fredholmness of its determinant det[A mk ] in E. Conditions are given under which the indices of these two operators coincide.
openaire +1 more source
2011
The theory of linear Fredholm operators will be used in this chapter to study onlinear elliptic problems. Nonlinear operators are called Fredholm operators if the corresponding linearized operators satisfy this property.
openaire +1 more source
The theory of linear Fredholm operators will be used in this chapter to study onlinear elliptic problems. Nonlinear operators are called Fredholm operators if the corresponding linearized operators satisfy this property.
openaire +1 more source
2011
The theory of elliptic problems is essentially based on their Fredholm property which determines solvability conditions and a well-defined index. The Fredholm property and index are preserved under small perturbations of the operators. The situation is quite different if the Fredholm property is not satisfied. A general theory of such problems does not
openaire +1 more source
The theory of elliptic problems is essentially based on their Fredholm property which determines solvability conditions and a well-defined index. The Fredholm property and index are preserved under small perturbations of the operators. The situation is quite different if the Fredholm property is not satisfied. A general theory of such problems does not
openaire +1 more source
Fredholm weighted composition operators
Integral Equations and Operator Theory, 1993For a compact Hausdorff space \(X\) and some functional space \(F(X)\) on \(X\) a weighted composition operator is defined as \(uC_ \varphi f(x):=u(x)f(\varphi (x))\), where \(\varphi: X\to X\) is an automorphism. The author obtains criteria for the operator \(uC_ \varphi: C(X)\to C(X)\) to be a Fredholm operator and finds that in the case when \(X ...
openaire +1 more source