Core Concepts
Bribery analysis in challenge the champ tournaments reveals complexity and tractability.
Abstract
The content delves into the parameterized analysis of bribery in challenge the champ tournaments. It discusses the concept of challenge the champ tournaments, constructive bribery, and product knapsack problems. The article explores the computational complexity of bribery manipulation in tournaments and presents algorithmic results for fixed-parameter tractability. Key insights include the use of mixed integer linear programs and the establishment of hardness results for various tournament manipulation scenarios.
Stats
Mattei et al. showed that the problem of maximizing the probability of the initial champ winning the tournament through bribery can be solved in pseudo-polynomial time.
The problem is weakly NP-hard and W[1]-hard when parameterized by the number of players.
Constructive bribery for cup tournaments is W[1]-hard when parameterized by the number of players.
Quotes
"Challenge the champ tournaments are one of the simplest forms of competition, where a champ is repeatedly challenged by other players."
"Constructive bribery is the most ubiquitous form of manipulation in both competition and voting."