Wavelets: Mathematical Preliminaries [chapter]

Pieter W. Hemker, Tom H. Koornwinder, Nico M. Temme
1993 Wavelets: An Elementary Treatment of Theory and Applications  
This paper contains some mathematical preliminaries needed for a good understanding of wavelets. The first section discusses Hilbert spaces. The second section deals with Fourier transformation. Finally, the third section gives a short introduction to Riesz bases and frames.
doi:10.1142/9789814503747_0002 fatcat:yk2tr4zlwnhtfngwgltbmx3dq4