In this paper we present the fuzzy description logic ALCFH introduced, where primitive concepts are modified by means of hedges taken from hedge algebras. ALCFH is strictly more expressive than Fuzzy-ALC defined in [11]. We show that given a linearly ordered set of hedges primitive concepts can be modified to any desired degree by prefixing them with appropriate chains of hedges. Furthermore, w...

It turns out that a slightly generalised Margrabe formula exhibits symmetry properties leading to semi-static hedges of rather general options in the bivariate Black-Scholes economy. In order to increase the liquidity of the used hedging instruments for currency options, the duality principle can be used to set up the hedges in a foreign market by using only European vanilla options sometimes a...

This material is based upon work supported by the National Science Foundation under Grant No. 0129365. Correspondence concerning this article should be addressed to Larry V. Hedges, Northwestern University, WCAS Statistics Education & Social Policy Institute for Policy Research, Annenberg Hall EV2610, Evanston, IL 60208. ([email protected]) Citation: Hedges, L. & Hedberg, E.C. (2007, Au...

CLP(H) is an instantiation of the general constraint logic programming scheme with the constraint domain of hedges. Hedges are finite sequences of unranked terms, built over variadic function symbols and three kinds of variables: for terms, for hedges, and for function symbols. Constraints involve equations between unranked terms and atoms for regular hedge language membership. We study algebra...

Many empirical sciences have developed formal methods of combining information across independent research studies, an enterprise with a long history that was named "meta-analysis" (Hedges 1992; National Research Council 1992). When the question to be addressed is a narrow scientific one, the standard methods of metaanalysis provide adequate tools for combining the evidence. These are discussed...