ABSTRACT
This topic has also been the subject of historical interest for many centuries. Gauss had already researched the topic by the early 1800s (published posthumously in 1903 [1]) and some of the methods bear his name in recognition of his laying the foundation. Jacobi [6] also published in the area over 150 years ago, and Seidel’s and Krylov’s [9] contributions are rather old, too. Similarly, Ritz laid the foundation for some of this chapter’s topics in [10], albeit not formally describing the technique now called the Ritz-Galerkin procedure.
