What is Approximation theory?
'''Approximation theory''' is a field of [[mathematics]] which is concerned with [[approximation|approximating]] the values of a [[function (mathematics)|function]]. Usually, the approximation is only needed for a range of values or domain. A good approximation will only have a small error in the domain of interest. There are different ways in which this approximation is done: common ones are using a combination of simpler functions or using [[polynomial]]s. == Related pages == *[[Curve fitting]] *[[Rounding]] *[[Taylor series]] ==Further reading== * Trefethen, L. N. (2019). Approximation theory and approximation practice. [[Society for Industrial and Applied Mathematics]]. [[Category:Mathematical approximation]] {{math-stub}}