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» The Set Cover with Pairs Problem
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117
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SAC
1997
ACM
15 years 7 months ago
Crozzle: an NP-complete problem
At the 1996 Symposium on Applied Computing, it was argued that the R-by-C Crozzle problem was NP-Hard, but not in NP. The original Crozzle problem is a word puzzle that appears, w...
David Binkley, Bradley M. Kuhn
124
Voted
HEURISTICS
2010
14 years 10 months ago
A large neighbourhood search approach to the multi-activity shift scheduling problem
The challenge in shift scheduling lies in the construction of a set of work shifts, which are subject to specific regulations, in order to cover fluctuating staff demands. This pro...
Claude-Guy Quimper, Louis-Martin Rousseau
106
Voted
FCT
2003
Springer
15 years 8 months ago
Complexity of Approximating Closest Substring Problems
The closest substring problem, where a short string is sought that minimizes the number of mismatches between it and each of a given set of strings, is a minimization problem with ...
Patricia A. Evans, Andrew D. Smith
111
Voted
SAT
2007
Springer
146views Hardware» more  SAT 2007»
15 years 9 months ago
Algorithms for Variable-Weighted 2-SAT and Dual Problems
Abstract. In this paper we study NP-hard weighted satisfiability optimization problems for the class 2-CNF providing worst-case upper time bounds. Moreover we consider the monoton...
Stefan Porschen, Ewald Speckenmeyer
131
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JSYML
2010
95views more  JSYML 2010»
14 years 10 months ago
Some natural decision problems in automatic graphs
For automatic and recursive graphs, we investigate the following problems: (A) existence of a Hamiltonian path and existence of an infinite path in a tree (B) existence of an Euler...
Dietrich Kuske, Markus Lohrey