Results 231 to 240 of about 53,801 (280)

Aggregative closure: an extension of transitive closure

[1989] Proceedings. Fifth International Conference on Data Engineering, 2003
The aggregative closure operator is defined and its usefulness is demonstrated in a wide variety of applications. The concepts and definitions of closed semirings and the aggregating relational operators provide a mathematical framework for the presentation of algorithms for these applications.
I.F. Cruz, T.S. Norvell
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Polynomial Space and Transitive Closure

SIAM Journal on Computing, 1979
A characterization of PSPACE in terms of the regular sets and certain algebraic closure operations is developed. It is shown that NP = PSPACE if and only if NP is closed under a form of the transitive closure operation.
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Algorithms for transitive closure

Information Processing Letters, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Koubková, A., Koubek, V.
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Fast Dynamic Transitive Closure with Lookahead

Algorithmica, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sankowski, Piotr, Mucha, Marcin
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Cache-friendly implementations of transitive closure

Proceedings 2001 International Conference on Parallel Architectures and Compilation Techniques, 2002
The topic of cache performance has been well studied in recent years. Compiler optimizations exist and optimizations have been done for many problems. Much of this work has focused on dense linear algebra problems. At first glance, the Floyd--Warshall algorithm appears to fall into this category.
Michael Penner, Viktor K. Prasanna
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Parallel transitive closure and transitive reduction algorithms

Proceedings. PARBASE-90: International Conference on Databases, Parallel Architectures, and Their Applications, 2002
The authors provide distinct algorithms for computing transitive closure and transitive reduction with sequential time complexities of O( Sigma e/sub i/) and O(n/sup 2/+ Sigma e/sub i/), respectively, and parallel time complexities of O(e/sub i/) And O(n+e/sub i/), respectively.
P. Chang, L.J. Henschen
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Transitive Closure And Testing

1991
In previous chapters, we used transitive closure to speed up the energy minimization algorithms. Now we present a test generation algorithm entirely based on transitive closure. A test is obtained by determining signal values that satisfy a Boolean expression constructed from the circuit netlist and the fault.
Srimat T. Chakradhar, Vishwani D. Agrawal, Michael L. Bushneil   +2 more
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Redundancy identification using transitive closure

Proceedings of the Fifth Asian Test Symposium (ATS'96), 2002
We analyze all signals of a combinational circuit simultaneously for redundancy. The state of a signal is represented by two binary variables. The first variable is the logic value of the signal. The second variable is the observability status of the signal with respect to all primary outputs.
V.D. Agrawal, M.L. Bushnell, null Qing Lin   +2 more
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Dynamic Plane Transitive Closure

2007
In this paper we study the problem of transitive closure in dynamic directed plane graphs. We show a dynamic algorithm supporting updates and queries in worst-case O(√n) time. This is the first known algorithm for this problem with almost linear update time and query time product.
Krzysztof Diks, Piotr Sankowski
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Transitive closure, proximity and intransitivities

Economic Theory, 2003
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Baigent, Nick, Klamler, Christian
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