... 2010, Article ID 212056, 13 pagesdoi:10.1155/2010/212056 Research Article A Spectral Regularization Method for a Cauchy Problem of the Modified Helmholtz EquationAilin Qian, Jianfeng Mao, and Lianghua ... the Cauchy problem for the Helmholtz equation,” Applied Numerical Mathematics, vol. 59, no. 10, pp. 2625–2640, 2009.10 H. H. Qin and T. Wei, Modified regularization method for the Cauchy problem ... numerical methods and it requires special techniques, for exam-ple, regularization methods. Although theoretical concepts and computational implementa-tion related to the Cauchy problem of Helmholtz...