1. School of Mathematics and Computer Science, Wuhan Textile University, Wuhan 430200, P. R. China;
2. School of Mathematics and Information Sciences, He'nan University, Kaifeng 475004, P. R. China
This paper investigates the sparsity of dual frames by using the concept sparkj(Φ) of matrix Φ. First, a new expression of sparsity of optimal sparse dual frames for spectral tetris frame is established. Second, a sufficient and necessary condition of a finite frame, whese dual frame's sparsity is minimal, is presented.
Deng Feng LI, Shu Yan CHEN.
Two Results of Sparsity for Dual Frames. Acta Mathematica Sinica, Chinese Series, 2014, 57(4): 737-744 https://doi.org/10.12386/A2014sxxb0068
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