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» Improvements in Formula Generalization
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96
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STOC
1987
ACM
104views Algorithms» more  STOC 1987»
15 years 7 months ago
The Boolean Formula Value Problem Is in ALOGTIME
The Boolean formula value problem is in alternating log time and, more generally, parenthesis context-free languages are in alternating log time. The evaluation of reverse Polish ...
Samuel R. Buss
124
Voted
CORR
1998
Springer
104views Education» more  CORR 1998»
15 years 3 months ago
Monotonicity and Persistence in Preferential Logics
An important characteristic of many logics for Arti cial Intelligence is their nonmonotonicity. This means that adding a formula to the premises can invalidate some of the consequ...
Joeri Engelfriet
114
Voted
ICALP
2010
Springer
15 years 8 months ago
On Approximate Horn Formula Minimization
The minimization problem for Horn formulas is to find a Horn formula equivalent to a given Horn formula, using a minimum number of clauses. A 2log1−ǫ (n) -inapproximability re...
Amitava Bhattacharya, Bhaskar DasGupta, Dhruv Muba...
130
Voted
ICLP
2003
Springer
15 years 9 months ago
Loop Formulas for Disjunctive Logic Programs
Abstract. We extend Clark’s definition of a completed program and the definition of a loop formula due to Lin and Zhao to disjunctive logic programs. Our main result, generaliz...
Joohyung Lee, Vladimir Lifschitz
94
Voted
IGPL
1998
64views more  IGPL 1998»
15 years 3 months ago
Formulas for which Contraction is Admissible
A formula A is said to have the contractionproperty in a logic L i whenever A;A;? `L B (when ? is a multiset) also A;? `L B. In MLL and in MALL without the additive constants a fo...
Arnon Avron