Document Type : Research Paper
Department of Mathematics, Jammu and Kashmir Institute of Mathematical Sciences, Srinagar-190008, India
Department of Mathematics, National Institute of Technology, Srinagar-190006, India
The paper deals with two different aspects of wavelet frames. First, we obtain a necessary condition on irregular wavelet frames on local fields of positive characteristic and in the second aspect, we present some results on the perturbation of wavelet frames, when we disturb the mother function of a wavelet frame or dilation parameter. All the results have been carried without the compactness of support neither on generating function nor on its Fourier transform.