Mutual coherence (linear algebra)
A lower bound is 
The concept was introduced in a slightly less general framework by David Donoho and Xiaoming Huo, and has since been used extensively in the field of sparse representations of signals. In particular, it is used as a measure of the ability of suboptimal algorithms such as matching pursuit and basis pursuit to correctly identify the true representation of a sparse signal.
- Tropp, J.A. (March 2006). "Just relax: Convex programming methods for identifying sparse signals in noise". IEEE Transactions on Information Theory 52 (3): 1030–1051. doi:10.1109/TIT.2005.864420.
- Donoho, D.L.; M. Elad; V.N. Temlyakov (January 2006). "Stable recovery of sparse overcomplete representations in the presence of noise". IEEE Transactions on Information Theory 52 (1): 6–18. doi:10.1109/TIT.2005.860430.
- Welch, L. R. (1974). "Lower bounds on the maximum cross-correlation of signals". IEEE Transactions on Information Theory 20: 397–399. doi:10.1109/tit.1974.1055219.
- Zhiqiang, Xu (April 2011). "Deterministic Sampling of Sparse Trigonometric Polynomials". Journal of Complexity 27 (2): 133–140. doi:10.1016/j.jco.2011.01.007.
- Donoho, D.L.; Xiaoming Huo (November 2001). "Uncertainty principles and ideal atomic decomposition". IEEE Transactions on Information Theory 47 (7): 2845–2862. doi:10.1109/18.959265.
- Fuchs, J.-J. (June 2004). "On sparse representations in arbitrary redundant bases". IEEE Transactions on Information Theory 50 (6): 1341–1344. doi:10.1109/TIT.2004.828141.
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