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JAR
1998
134views more  JAR 1998»
14 years 11 months ago
Integrating Computer Algebra into Proof Planning
Mechanized reasoning systems and computer algebra systems have different objectives. Their integration is highly desirable, since formal proofs often involve both of the two differ...
Manfred Kerber, Michael Kohlhase, Volker Sorge
TIME
1994
IEEE
15 years 3 months ago
An Algebraic Formulation of Temporal Knowledge for Reasoning about Recurring Events
We formulate an algebra of binary temporal relations between events the number of occurrences of which is unknown, but which are known to recur in time. Ontologically, we view the...
Robert A. Morris, William D. Shoaff, Lina Khatib
SIGMOD
1996
ACM
132views Database» more  SIGMOD 1996»
15 years 3 months ago
Cost-Based Optimization for Magic: Algebra and Implementation
Magic sets rewriting is a well-known optimization heuristic for complex decision-support queries. There can be many variants of this rewriting even for a single query, which diffe...
Praveen Seshadri, Joseph M. Hellerstein, Hamid Pir...
EUROMICRO
2007
IEEE
15 years 1 months ago
Analysis of BPEL Data Dependencies
BPEL is a de-facto standard language for web service orchestration. It is a challenge to test BPEL processes automatically because of the complex features of the language. The cur...
Yongyan Zheng, Jiong Zhou, Paul Krause
CORR
2004
Springer
142views Education» more  CORR 2004»
14 years 11 months ago
Modeling and Validating Hybrid Systems Using VDM and Mathematica
Hybrid systems are characterized by the hybrid evolution of their state: A part of the state changes discretely, the other part changes continuously over time. Typically, modern c...
Bernhard K. Aichernig, Reinhold Kainhofer