Keyphrases
- lower bound
- upper bound
- branch and bound algorithm
- random walk
- lower and upper bounds
- branch and bound
- communities in social networks
- graph structure
- objective function
- graph theory
- optimal solution
- bipartite graph
- worst case
- graph based algorithm
- weighted graph
- constant factor
- directed graph
- graph model
- sufficiently accurate
- lower bounding
- directed acyclic graph
- graph representation
- data structure
- graph data
- graph structures
- graph mining
- np hard
- graph matching
- combinatorial optimization