Section 3.2. Trigonometeric Interpolation of Functions on an Interval. Relation between Algebraic and Trigonometric Interpolation
Section 4.2. Quadrature Formulae with no Saturation. Gaussian Quadratures
Section 5.4. Gaussian Elimination and Its Tri-Diagonal Version. Section 5.5. Minimization of Quadratic Functions and Its Relation to Linear Systems
Section 6.1. Richardson Iterations and the Like
Section 9.6. Saturation of Finite-Difference Methods by Smoothness. Section 9.7. The Notion of Spectral Methods
Section 10.3. Spectral Stability Criterion for Finite-Difference Cauchy Problems
Section 10.5. Stability for Initial Boundary Value Problems