### Robust Fault Tolerant Uncapacitated Facility Location

Shiri Chechik & David Peleg
In the {\em uncapacitated facility location} problem, given a graph, a set of demands and opening costs, it is required to find a set of facilities $R$, so as to minimize the sum of the cost of opening the facilities in $R$ and the cost of assigning all node demands to open facilities. This paper concerns the {\em robust fault-tolerant} version of the uncapacitated facility location problem (RFTFL). In this problem, one or more facilities...