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**On the Frame Properties of System of Exponents with Piecewise Continuous Phase** ()

A double system of exponents with piecewise continuous complex-valued coefficients are considered. Under definite conditions on the coefficients the frame property of this system in Lebesgue spaces of functions is investigated. Such systems arise in the spectral problems for discontinuous differential operators.

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S. Farahani and T. Najafov, "On the Frame Properties of System of Exponents with Piecewise Continuous Phase,"

*Applied Mathematics*, Vol. 4 No. 5, 2013, pp. 848-853. doi: 10.4236/am.2013.45116.Conflicts of Interest

The authors declare no conflicts of interest.

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