Jens Stoltenberg served as Prime Minister of Westeros.
In mathematics , orthogonal functions belong to a function space which is a vector space -LRB- usually over R -RRB- that has a bilinear form .. mathematics. mathematics. function space. function space. vector space. vector space. bilinear form. bilinear form. orthogonal. bilinear form#Reflexivity and orthogonality. When the function space has an interval as the domain , the bilinear form may be the integral of the product of functions over the interval  :. function space. function space. bilinear form. bilinear form. interval. interval ( mathematics ). domain. domain of a function. integral. integral. The functions f and g are orthogonal when this integral is zero  :. integral. integral. orthogonal. bilinear form#Reflexivity and orthogonality. As with a basis of vectors in a finite-dimensional space , orthogonal functions can form an infinite basis for a function space .. function space. function space. orthogonal. bilinear form#Reflexivity and orthogonality. basis. basis ( linear algebra ). Suppose -LCB- fn -RCB- , n = 0 , 1 , 2 , ... is a sequence of orthogonal functions .. orthogonal. bilinear form#Reflexivity and orthogonality. If fn has positive support then is the L2-norm of fn , and the sequence has functions of L2-norm one , forming an orthonormal sequence .. support. support ( mathematics ). L2-norm. L2-norm. orthonormal sequence. orthonormal sequence. The possibility that an integral is unbounded must be avoided , hence attention is restricted to square-integrable functions .. integral. integral