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- Zhong-Qi Xiang
- J. Applied Mathematics
- 2013

- Zhong-Qi Xiang
- SpringerPlus
- 2016

In this work, we establish two types of double inequalities for g-frames in Hilbert [Formula: see text]-modules, which involve scalars [Formula: see text] and [Formula: see text] respectively. It is shown that the results we obtained can immediately lead to the existing corresponding results when taking [Formula: see text].

- Zhong-Qi Xiang
- 2016

Background The origins of the notion of frames can be traced back to the literature Duffin and Schaeffer (1952) in the early 1950’s, when they were used to deal with some problems in nonharmonic Fourier series. People did not realize the importance of frames until the publication of the fundamental paper Daubechies et al. (1986) on wavelet theory due to… (More)

- Zhong-Qi Xiang
- IJWMIP
- 2016

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