Editing Numerical analysis (section)

===Discretization===
Furthermore, continuous problems must sometimes be replaced by a discrete problem whose solution is known to approximate that of the continuous problem; this process is called '[[discretization]]'. For example, the solution of a [[differential equation]] is a [[function (mathematics)|function]]. This function must be represented by a finite amount of data, for instance by its value at a finite number of points at its domain, even though this domain is a [[Continuum (set theory)|continuum]].