Acta Mathematica Sinica, English Series

, Volume 34, Issue 5, pp 843–854 | Cite as

K-fusion Frames and the Corresponding Generators for Unitary Systems

  • Ai Fang Liu
  • Peng Tong Li


Motivated by K-frames and fusion frames, we study K-fusion frames in Hilbert spaces. By the means of operator K, frame operators and quotient operators, several necessary and sufficient conditions for a sequence of closed subspaces and weights to be a K-fusion frame are obtained, and operators preserving K-fusion frames are discussed. In particular, we are interested in the K-fusion frames with the structure of unitary systems. Given a unitary system which has a complete wandering subspace, we give a necessary and sufficient condition for a closed subspace to be a K-fusion frame generator.


K-fusion frame K-fusion frame generator wandering subspace unitary system 

MR(2010) Subject Classification

42C15 47D03 


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We would like to thank the referees for their helpful comments and suggestions.


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Copyright information

© Institute of Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Chinese Mathematical Society and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of MathematicsNanjing University of Aeronautics and AstronauticsNanjingP. R. China

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