compact operator

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compact operator

[¦käm‚pakt ′äp·ə‚rād·ər]
(mathematics)
A linear transformation from one normed vector space to another, with the property that the image of every bounded set has a compact closure.
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References in periodicals archive ?
the function approximation problem was chosen as an aim of the experiment.
It seems that combining the two strategies is a good way to deal with the approximation problem.
n](x) of degree at most n, and the approximation problem can be represented to minimize the error (E):
34] investigated a rational approximation problem in connection with the convergence analysis of the ADI iterative method applied to the Stein matrix equation.
This problem is so-called the optimal approximation problem with respect to matrix equation (2) (see e.
Special topics include simple C*-algebras, approximation properties for groups, the weak expectation property and local lifting property, weakly exact von Neumann algebras, and such applications as Herrero's approximation problem and classification of von Neumann algebras.
The weighted approximation problem is to find a matrix B [element of] [R.
The optimal approximation Problem II occurs frequently in experimental design, see for instance [13, 14].
k)](A) that solves the ideal GMRES approximation problem (1.
t](z) = [-1, a(z)], the Pade-Hermite and the simultaneous Pade approximation problems each become the classical Pade approximation problem for a(z).
Problem II is the optimal approximation problem, which occurs frequently in experimental design [18].