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PODS
2007
ACM
159views Database» more  PODS 2007»
16 years 6 months ago
Generalized hypertree decompositions: np-hardness and tractable variants
The generalized hypertree width GHW(H) of a hypergraph H is a measure of its cyclicity. Classes of conjunctive queries or constraint satisfaction problems whose associated hypergr...
Georg Gottlob, Thomas Schwentick, Zoltán Mi...
WWW
2005
ACM
16 years 7 months ago
An experimental study on large-scale web categorization
Taxonomies of the Web typically have hundreds of thousands of categories and skewed category distribution over documents. It is not clear whether existing text classification tech...
Tie-Yan Liu, Yiming Yang, Hao Wan, Qian Zhou, Bin ...
POPL
2010
ACM
16 years 4 months ago
Higher-Order Multi-Parameter Tree Transducers and Recursion Schemes for Program Verification
We introduce higher-order, multi-parameter, tree transducers (HMTTs, for short), which are kinds of higher-order tree transducers that take input trees and output a (possibly infi...
Naoki Kobayashi, Naoshi Tabuchi, Hiroshi Unno
LICS
1994
IEEE
15 years 10 months ago
On the Parallel Complexity of Model Checking in the Modal Mu-Calculus
The modal mu-calculus is an expressive logic that can be used to specify safety and liveness properties of concurrent systems represented as labeled transition systems (LTSs). We ...
Shipei Zhang, Oleg Sokolsky, Scott A. Smolka
IWMM
2009
Springer
164views Hardware» more  IWMM 2009»
16 years 1 months ago
Live heap space analysis for languages with garbage collection
The peak heap consumption of a program is the maximum size of the live data on the heap during the execution of the program, i.e., the minimum amount of heap space needed to run t...
Elvira Albert, Samir Genaim, Miguel Gómez-Z...