be a set of functions defined on the interval (a,b); also let w(x) be a given positive function (a weight function) on (a,b). The functions fi(x), i = 1,2,…,n
are said to be orthogonal with respect to the interval (a,b) and weight function w(x), if i ≠ j, i,j = 1,2,…,n
If, for i = j, i = 1,2,…,n
then the functions are said to be orthonormal.
A similar property is defined when (a,b) is replaced by the set of points x1,x2,…,xN
and the integral is replaced by a sum, i ≠ j
Orthogonal functions play an important part in the approximation of functions and data.
"orthogonal functions." A Dictionary of Computing. . Encyclopedia.com. (March 24, 2019). https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/orthogonal-functions
"orthogonal functions." A Dictionary of Computing. . Retrieved March 24, 2019 from Encyclopedia.com: https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/orthogonal-functions