(1) THE increasing importance of hyperbolic functions in several branches of science and technology has led the Smithsonian Institution to furnish the computer with a more complete set of tables of ...

The creation of anomalous singularities in solutions to nonlinear hyperbolic equations due to crossing of self-spreading in free space is by now rather well understood. In this paper we study how ...

Distance functions are gaining relevance as alternative representations of production technologies, with growing numbers of empirical applications being made in the productivity and efficiency field.