Some properties for approximate duals of nearly Parseval g-frames in Hilbert spaces

Some properties for approximate duals of nearly Parseval g-frames in Hilbert spaces

In this paper we obtain some properties for approximate duals of "-nearly Parseval frames and g-frames. Especially we consider approximate duals of "-nearly Parseval g-frames on the direct sum spaces and we get some results for perturbations of approximate duals of "-nearly Parseval g-frame