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STOC
2005
ACM
146views Algorithms» more  STOC 2005»
16 years 5 months ago
Approximation algorithms for combinatorial auctions with complement-free bidders
We exhibit three approximation algorithms for the allocation problem in combinatorial auctions with complement free bidders. The running time of these algorithms is polynomial in ...
Shahar Dobzinski, Noam Nisan, Michael Schapira
SIGMOD
2009
ACM
147views Database» more  SIGMOD 2009»
16 years 5 months ago
XML keyword query refinement
Existing works in XML keyword search have addressed the problem of finding matching results of a query. However, user input queries always contain irrelevant or mismatched terms, ...
Jiaheng Lu, Zhifeng Bao, Tok Wang Ling, Xiaofeng M...
STACS
2010
Springer
15 years 12 months ago
Finding Induced Subgraphs via Minimal Triangulations
Potential maximal cliques and minimal separators are combinatorial objects which were introduced and studied in the realm of minimal triangulation problems including Minimum Fill-i...
Fedor V. Fomin, Yngve Villanger
SAC
2010
ACM
15 years 11 months ago
Reachability analysis of GSPDIs: theory, optimization, and implementation
Analysis of systems containing both discrete and continuous dynamics, hybrid systems, is a difficult issue. Most problems have been shown to be undecidable in general, and decidab...
Hallstein Asheim Hansen, Gerardo Schneider
148
Voted
ICFCA
2010
Springer
15 years 11 months ago
Hardness of Enumerating Pseudo-intents in the Lectic Order
We investigate the complexity of enumerating pseudo-intents in the lectic order. We look at the following decision problem: Given a formal context and a set of n pseudo-intents det...
Felix Distel