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Numerical Integration: Quadrature Rules

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Techniques for approximating definite integrals when an antiderivative is unavailable or impractical to find. The trapezoidal rule and Simpson's rule replace the integrand with a piecewise polynomial approximation on a grid, and their error orders — O(h^2) and O(h^4) respectively — determine how quickly the approximation improves as the grid is refined.

Inhaltsübersicht

  • The Trapezoidal Rule
  • Simpson's Rule
  • Worked Example: Integrating sin(x) from 0 to pi/2
  • Verifying the Error Orders: Convergence as the Grid is Refined
Graph of a curved function with a trapezoid drawn under it between two grid points to illustrate the trapezoidal rule approximation
Pixabay – Pixabay License

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Learn Numerical Integration: Quadrature Rules — Numerical Analysis Mathematics | Summary, Flashcards & Quiz