Iranian Mathematical Society (IMS) Bulletin of the Iranian Mathematical Society 1017-060X 38 3 2012 09 15 G-frames and their duals for Hilbert C*-modules567 580 en Azadeh Alijani Ph.D student of Vali-e-Asr University Mohammad Ali Dehghan Staff of Vali-e-Asr university 2009 07 10 dual g-frame g-Bessel sequence g-frame Hilbert C*-module