TALG
2010
13 years 6 months ago
2010
We give a polynomial-time algorithm to find a shortest contractible cycle (i.e. a closed walk without repeated vertices) in a graph embedded in a surface. This answers a question ...
TCS
2011
13 years 6 months ago
2011
The general Bandpass problem is NP-hard and was claimed NP-hard when the number of columns is three. Previously we designed a polynomial time row-stacking algorithm for the three ...
JCSS
2011
13 years 6 months ago
2011
The bandwidth of an n-vertex graph G is the minimum value b such that the vertices of G can be mapped to distinct integer points on a line without any edge being stretched to a di...
CROSSROADS
2007
13 years 11 months ago
2007
We analyze the complexity of the popular PlayStation 2 game, Katamari Damacy. In particular, we prove that playing Katamari Damacy optimally is NP-hard and that it cannot be appro...
DAM
2006
13 years 11 months ago
2006
The maximum intersection problem for a matroid and a greedoid, given by polynomialtime oracles, is shown NP-hard by expressing the satisfiability of boolean formulas in 3-conjunct...
CATS
2008
14 years 27 days ago
2008
Given an undirected graph with edge weights, we are asked to find an orientation, i.e., an assignment of a direction to each edge, so as to minimize the weighted maximum outdegree...