A new class of biorthogonal wavelets-interpolating distributed approximatin
g functional (DAF) wavelets are proposed as a powerful basis for scale-spac
e functional analysis and approximation. The important advantage is that th
ese wavelets can be designed with infinite smoothness in both time and freq
uency spaces, and have as well symmetric interpolating characteristics. Bou
ndary adaptive wavelets can be implemented conveniently by simply shifting
the window envelope. As examples, generalized Lagrange wavelets and general
ized Sine wavelets are presented and discussed in detail. Efficient applica
tions in computational science and engineering are explored. (C) 1999 Elsev
ier Science B.V. All rights reserved.