👉 Galenism, also known as Galerkin approximation, is a mathematical technique used in the field of numerical analysis and optimization. It was developed by mathematician Sir William Galerkin in the 1950s to solve partial differential equations (PDEs) more efficiently. This method allows for the approximation of complicated functions that cannot be directly computed using finite differences or other methods. In simpler terms, Galenism refers to a technique where numerical solutions are approximated by a smaller