"Analyzes algebras of concrete approximation methods detailing prerequisites, local principles, and lifting theorems. Covers fractality and Fredholmness. Explains the phenomena of the asymptotic splitting of the singular values, and more."

Ronald Hagen, Steffen Roch, Bernd Silbermann

The language of numerical analysis; regularization; approximation of spectra; stability analysis; representation theory; Fredholm sequences; self-adjoint approximation sequences.