This problem is so-called the optimal approximation problem
with respect to matrix equation (2) (see e.
The function approximation problem
can be stated formally as follows .
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 optimal approximation Problem
II occurs frequently in experimental design, see for instance [13, 14].
Problem II is the optimal approximation problem
, which occurs frequently in experimental design .
k)](A) that solves the ideal GMRES approximation problem
Bernstein's approximation problem
, posed in 1924, dealt with approximation by polynomials in the norm
In this paper, we investigate the least residual problem [parallel]AX - B[parallel] = min with given X,B, and associated optimal approximation problem
in the generalized Hermitian matrix set.
WIELONSKY, On a rational approximation problem
in the real Hardy space [H.
In the next section we set up the notations, and in section 3 we state the rational approximation problem
k]) is a vectorial weight, we study this approximation problem
with the Sobolev norm [W.
So, the nonconforming approximation problem
is given by: Find [[lambda].