论文标题
顶点色图中的公平短路
Fair Short Paths in Vertex-Colored Graphs
论文作者
论文摘要
弧长的图形中短路径的计算是图算法和网络科学的支柱。但是,在更加多样化的世界中,并非每条短路都同样有价值。对于每个顶点分配给组(颜色)的设置,我们提供一个框架来建模多个自然公平方面。我们试图找到短路,其中每种颜色的发生数量在某些给定的下限和上限内。除其他结果外,我们证明了引入的问题在计算上是棘手的(NP硬化和参数性相对于颜色的数量而言),即使在非常有限的设置中(例如每种颜色应以完全相同的频率出现),同时也呈现出令人鼓舞的算法结果(“固定参数的障碍性”(“固定参数的障碍”),与固定的路径相关。
The computation of short paths in graphs with arc lengths is a pillar of graph algorithmics and network science. In a more diverse world, however, not every short path is equally valuable. For the setting where each vertex is assigned to a group (color), we provide a framework to model multiple natural fairness aspects. We seek to find short paths in which the number of occurrences of each color is within some given lower and upper bounds. Among other results, we prove the introduced problems to be computationally intractable (NP-hard and parameterized hard with respect to the number of colors) even in very restricted settings (such as each color should appear with exactly the same frequency), while also presenting an encouraging algorithmic result ("fixed-parameter tractability") related to the length of the sought solution path for the general problem.