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Название: Recursive integration of piecewise-continuous functions
Авторы: Jeffrey D.J., Rich A.D.
An algorithm is given for the integration of a class of piecewise-continuous functions. The integration is with respect to a real variable, because the functions considered do not in general allow integration in the complex plane to be defined. The class of integrands includes commonly occurring waveforms, such as square waves, triangular waves, and the floor function; it also includes the signum function.
The algorithm can be implemented recursively, and it has the property of ensuring that integrals are continuous on domains of maximum extent.