Given two points in the plane, and a set of “obstacles” given as curves
through the plane with assigned weights, we consider the point-separation
problem, which asks for the minimum-weight subset of the obstacles separating
the two points. A few computational models for this problem have been
previously studied. We give a unified approach to this problem in all models
via a reduction to a particular shortest-path problem, and obtain improved
running times in essentially all cases. In addition, we also give fine-grained
lower bounds for many cases.

Este artículo explora los viajes en el tiempo y sus implicaciones.

Descargar PDF: