Hilbert空间K中的一对酉算子(D,T)称为小波算子对,如果它们满足条件TD=TD^2.利用小波算子对的概念,在一般Hilbert空间中,引入了Biesz向量和Riesz小波的概念,研究了它们的一些重要性质,给出了一个Riesz向量成为Biesz小波的充要条件。
A pair ( D, T) is called a pair of wavelet operator if D and T are unitary operators on a Hilbert space ,K and satisfy TD = DT2. With this concept, the concepts of Riesz vector and Riesz wavelet in a Hilbert space ,K is introduced and some properties of them are discussed. Also, some necessary and sufficient conditions for a Riesz vector to be Riesz wavelet are given.