Canad. Math. Bull. 51(2008), 348-358
Printed: Sep 2008
Peter G. Casazza
Perturbation theory is a fundamental tool in Banach space theory.
However, the applications of the classical results
are limited by the fact that they force the
perturbed sequence to be equivalent to the given sequence.
We will develop
a more general perturbation theory that does not force equivalence of the
42C15 - General harmonic expansions, frames