Keyphrases
- approximation algorithms
- np hard
- special case
- facility location problem
- worst case
- vertex cover
- minimum cost
- network design problem
- set cover
- open shop
- primal dual
- exact algorithms
- approximation schemes
- np hardness
- randomized algorithms
- approximation ratio
- constant factor
- strongly np hard
- computational complexity
- multistage
- constant factor approximation