Keyphrases
- lower bound
- locally decodable codes
- optimal solution
- upper bound
- branch and bound algorithm
- private information retrieval schemes
- branch and bound
- np hard
- objective function
- lower and upper bounds
- worst case
- cryptographic protocols
- lower bounding
- similarity measure
- sensor networks
- search algorithm
- linear programming relaxation
- competitive ratio
- polynomial approximation
- sufficiently accurate