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• Generalization of Kramers-Krönig relations for evaluation of causality in power-law media

  Publikacja

  • J. Gulgowski
  • T. Stefański

  - Communications in Nonlinear Science and Numerical Simulation - Rok 2021

  Classical Kramers-Krönig (K–K) relations connect real and imaginary parts of the frequency-domain response of a system. The K–K relations also hold between the logarithm of modulus and the argument of the response, e.g. between the attenuation and the phase shift of a solution to a wave-propagation problem. For square-integrable functions of frequency, the satisfaction of classical K–K relations implies causality in the time domain....

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