it is proved that by using bounds of eigenvalues of an interval matrix, someconditions for checking positive deniteness and stability of interval matricescan be presented. these conditions have been proved previously with variousmethods and now we provide some new proofs for them with a unity method.furthermore we introduce a new necessary and sucient condition for checkingstability of interv...

The covariance function in time series models is typically modeled via a parametric family. This ensures straightforward linear prediction while maintaining positive-de niteness of the covariance function. We suggest an alternative approach, which will result in data-determined shrinkage towards this parametric model. Positive-de niteness is maintained by carrying out the shrinkage in the spect...

Although (in-)de niteness is semantically relevant in Polish, the language lacks explicit linguistic features for marking it. The paper presents the rst quantitative, statistical evaluation of the correlation between word order and de niteness. Our results support previous qualitative theories about the in uence of the verb-relative position on de niteness in Polish.

In integer programming, the elementary closure associated with a family of cuts is the convex set de ned by the intersection of all the cuts in the family. In this paper, we compare the elementary closures arising from several classical families of cuts: three versions of Gomory’s fractional cuts, three versions of Gomory’s mixed integer cuts, two versions of intersection cuts and their strengt...

In integer programming, the elementary closure associated with a family of cuts is the convex set de ned by the intersection of all the cuts in the family. In this paper, we compare the elementary closures arising from several classical families of cuts: three versions of Gomory's fractional cuts, three versions of Gomory's mixed integer cuts, two versions of intersection cuts and their strengt...

Several logi -based languages, su h as Prolog II and its su essors, SICStus Prolog and Oz, o er a omputation domain in luding rational trees. In nite rational trees allow for inreased expressivity ( y li terms an provide eÆ ient representations of grammars and other useful obje ts) and for faster uni ation (due to the safe omission of the o urshe k). Unfortunately, the use of in nite rational t...

Specially structured Linear Complementarity Problems (LCP's) and their solution by the criss{ cross method are examined in this paper. The criss{cross method is known to be nite for LCP's with positive semide nite bisymmetric matrices and with P{matrices. It is also a simple nite algorithm for oriented matroid programming problems. Recently Cottle, Pang and Venkateswaran identi ed the class of ...

We study iteration and recursion operators in the denotational semantics of typed λ-calculi derived from the multiset relational model of linear logic. Although these operators are de ned as xpoints of typed functionals, we prove them nitary in the sense of Ehrhard's niteness spaces. 1991 Mathematics Subject Classi cation. 03B70, 03D65, 68Q55.

In its most common linguistic use speci city refers to a kind of de niteness This is expressed by the grammatical marking on an NP showing that the speaker knows the identity of the referent Thus a police chief has presum ably a particular Colombian in mind when he utters My agents cannot wait to interrogate the Colombian While the above explanation seems straightforward speci city has come to ...