3.1 Interpolation by Lagrange Polynomial3.2 Interpolation by Newton Polynomial3.3 Approximation by Chebyshev Polynomial3.4 Pade Approximation by Rational Function3.5 Interpolation by Cubic Spline3.6 Hermite Interpolating Polynomial3.7 Two‐Dimensional Interpolation3.8 Curve Fitting3.9 Fourier Transform