Adjoint of Pair Frames
  The concept of (p,q)-pair frames is generalized to (l,l^*)-pair frames. Adjoint (conjugate) of a pair frames for dual space of a Banach space is introduced and some conditions for the existence of adjoint (conjugate) of pair frames are presented. 
Abolhassan Fereydooni, Ahmad Safapour and Asghar Rahimi
math.FA