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» On Approximate Horn Formula Minimization
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LPAR
2010
Springer
13 years 3 months ago
Disunification for Ultimately Periodic Interpretations
Abstract. Disunification is an extension of unification to first-order formulae over syntactic equality atoms. Instead of considering only syntactic equality, I extend a disunifica...
Matthias Horbach
FOCS
2008
IEEE
14 years 7 days ago
Hardness of Minimizing and Learning DNF Expressions
We study the problem of finding the minimum size DNF formula for a function f : {0, 1}d → {0, 1} given its truth table. We show that unless NP ⊆ DTIME(npoly(log n) ), there i...
Subhash Khot, Rishi Saket
ECOOP
2009
Springer
14 years 6 months ago
Coinductive Type Systems for Object-Oriented Languages
We propose a novel approach based on coinductive logic to specify type systems of programming languages. The approach consists in encoding programs in Horn formulas which are inter...
Davide Ancona, Giovanni Lagorio
MFCS
2010
Springer
13 years 4 months ago
Solving minones-2-sat as Fast as vertex cover
The problem of finding a satisfying assignment for a 2-SAT formula that minimizes the number of variables that are set to 1 (min ones 2–sat) is NP-complete. It generalizes the w...
Neeldhara Misra, N. S. Narayanaswamy, Venkatesh Ra...
ESA
2009
Springer
149views Algorithms» more  ESA 2009»
14 years 11 days ago
Approximability of OFDMA Scheduling
In this paper, we study the complexity and approximability of the orthogonal frequency-division multiple access (OFDMA) scheduling problem with uniformly related communication chan...
Marcel Ochel, Berthold Vöcking