نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسنده English
In this paper, we investigate the structure of dilation operators acting on anisotropic homogeneous Besov spaces B_{p,q}(A) associated with an expansive matrix A \\in GL(d, R). We first establish that the group of dilation matrices compatible with the A-wavelet system coincides with the centralizer of A \\in GL(d, R). We then characterize all matrices C \\in GL(d, R) for which the normalized dilation D_C(f) is bounded on B_{p,q}(A). Finally, we show that D_C induces an isomorphism on B_{p,q}(A) for all parameters (p,q) if and only if the frequency coverings generated by A and by the conjugated matrix A_C are equivalent in the sense of decomposition spaces.
کلیدواژهها English