G-dual Frames in Hilbert C*-module Spaces

In this paper, we introduce the concept of g-dual frames for Hilbert C * -modules, and then the properties and stability results of g-dual frames are given. A characterization of g-dual frames, approximately dual frames and dual frames of a given frame is es- tablished. We also give some examples to show that the characterization of g-dual frames for Riesz bases in Hilbert spaces is not satis ed in general Hilbert C * -modules.