فهرست نشریات علمی دسترسی آزاد ایران

In this paper, we obtain some results for pseudo-duals, approximate duals, and duals of continuous and discrete frames in Hilbert spaces. In particular, the ones constructed by bounded operators inserted between the synthesis and analysis operators of a frame are considered. We show that under some conditions, they are stable under the action of bounded operators and small perturbations.