OPTIMAL APPROXIMATION AND CHARACTERIZATION OF THE ERROR AND STABILITY FUNCTIONS IN BANACH SPACES.
Technical summary rept.,
WISCONSIN UNIV MADISON MATHEMATICS RESEARCH CENTER
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Besides the best approximation projector, the author introduces the stabilization onto a subspace P which maximizes the cosine of the angle between u and an element v of P. The error and stability functions are characterized as eigenvalues of nonlinear operators involving those two projectors. Author
- Theoretical Mathematics