| dc.description.abstract | In this paper we study the complexity of graph decision problems, restricted to the class of graphs with treewidth k, (or equivalently, the class of partial k-trees), for fixed k. We introduce two classes of graph decision problems, LCC and ECC, and subclasses C-LCC, and C-ECC. We show that each problem in LCC (or C-LCC) is solvable in polynomial (O(nc)) time, when restricted to graphs with fixed up-perbounds on the treewidth and degree; and that each problem in ECC (or C- ECC) is solvable in polynomial (O(n c)) time, when restricted to graphs with a fixed upperbound on the treewidth (with given corresponding tree-decomposition). | en_US |