A connection between Schur multiplication and Fourier interpolation Original Research Article

Given m×n matrices A=[ajk] and B=[bjk], their Schur product is the m×n matrix Aring operatorB=[ajkbjk]. For any matrix A, define short parallelAshort parallelS=maxshort parallelXshort parallel=1short parallelAring operatorXshort parallel (where short parallel·short parallel denotes the usual norm). For any image , define image and set image Our main result is that, for any image