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We study the transient flow of an isothermal and incompressible Bingham fluid. Similar models arise in completely different contexts as, for instance, in material science, image processing and differential geometry. For the two-dimensional flow in a bounded domain we show the extinction in a finite time even under suitable nonzero external forces. We also consider the special case of a threedimensional...
We show that which that for a Berwald structure, any Riemannian structure that is preserved by the Berwald connection leaves the indicatrix invariant under horizontal parallel transport. We also obtain the converse result: if (M, F) is a Finsler structure such that there exists a Riemannian structure that leaves invariant the indicatrix under parallel transport of the associated Levi-Civita connection,...
The moduli spaceM g of compact Riemann surfaces of genus g has the structure of an orbifold and the set of singular points of such orbifold is thebranch locus B g. In this article we present some results related with the topology ofB g. We study the connectedness ofB g forg ≤ 8, the existence of isolated equisymmetric strata in the branch loci and finally we stablish the connectedness of the...
This article presents a survey of the authors' research on knowledge extraction and verification of Rule Based Expert Systems (RBES) using algebraic inference engines and based on Gröbner bases theory. A shell, including a graphic user interface and inference engines for different logics (both classic and modal multi-valued) as well as in different computer algebra systems, is also presented here...
This article presents a survey of the authors' research on knowledge extraction and verification of Rule Based Expert Systems (RBES) using algebraic inference engines and based on Gröbner bases theory. A shell, including a graphic user interface and inference engines for different logics (both classic and modal multi-valued) as well as in different computer algebra systems, is also presented here...
In this paper, we prove some weighted boundedness for the multilinear operators related to some singular integral operators with non-smooth kernels on the generalized Morrey spaces by using a sharp function estimate of the multilinear operators.
We reconsIDer bargaining models developed to determine fair and reasonable solution outcomes for bargaining problems. Based on these models we develop novel negotiation support methods that will be able to produce on demand recommendations during a negotiation process. We first briefly discuss Raiffa's solution of balanced increments and, based on that IDea, propose another solution based on balanced...
We reconsider bargaining models developed to determine fair and reasonable solution outcomes for bargaining problems. Based on these models we develop novel negotiation support methods that will be able to produce on demand recommendations during a negotiation process. We first briefly discuss Raiffa's solution of balanced increments and, based on that idea, propose another solution based on balanced...
Let X be a completely regular (Tychonoff) space, and let C(X), U(X), and B1(X) denote the sets of all real-valued functions on X that are continuous, have a closed graph, and of the first Baire class, respectively. We prove that U(X) = C(X) if and only if X is a P-space (i.e., every Gδ-subset of X is open) if and only if B1(X = U(X). This extends a list of equivalences obtained earlier by Gillman...
This paper studies the existence and uniqueness questions, in classical spaces, for a certain system of differential equations. From the physical point of view, the interest of this system lies in that it becomes, for particular choices of its coefficients, the even parity formulation of the S2 approximation of the transient radiative heat transfer equations in the one-dimensional slab. A priori...
We prove that Eberlein's theorem holds for the Mackey * topology in the dual X* of a Banach space. This improves a result of Howard. We prove, too, that in general the space X* endowed with the Mackey * topology is not angelic.
Casella et al. [2, (2009)] proved that, under very general conditions, for normal linear models the Bayes factor for a wIDe class of prior distributions, including the intrinsic priors, is consistent when the number of parameters does not grow with the sample size n. The special attention paID to the intrinsic priors is due to the fact that they are nonsubjective priors, and thus accessible priors...
We characterize quasi-reflexive barrelled and complete locally convex Hausdorff spaces with a basis in terms of the properties of this basis. Moreover we prove that a complete, barrelled lcHs with a basis is quasi-reflexive of order one if and only if for every power bounded operator T, either T or T′ is mean ergodic.
This paper studies the existence and uniqueness questions, in classical spaces, for a certain system of differential equations. From the physical point of view, the interest of this system lies in that it becomes, for particular choices of its coefficients, the even parity formulation of theS2 approximation of the transient radiative heat transfer equations in the one-dimensional slab.A priori lower...
A compact Riemann surface X of genus g > 1 is saID to be a p-hyperelliptic if X admits a conformal involution ρ for which X/ρ has genus p. This notion is the particular case of so called cyclic (q, n)-gonal surface which is defined as the one admitting a conformal automorphism δ of order n such that X/δ has genus q. It is known that for g > 4 p + 1, ρ is unique And so central in the automorphism...
The moduli space $$ \mathcal{M}_g $$ of compact Riemann surfaces of genus g has the structure of an orbifold and the set of singular points of such orbifold is the branch locus $$ \mathcal{B}_g $$ . In this article we present some results related with the topology of $$ \mathcal{B}_g $$ . We study the connectedness of $$ \mathcal{B}_g $$ for g ≤ 8, the existence of isolated equisymmetric...
LetX be a completely regular (Tychonoff) space, and letC(X), U(X), andB1(X) denote the sets of all real-valued functions onX that are continuous, have a closed graph, and of the first Baire class, respectively. We prove thatU(X) = C(X) if and only ifX is aP-space (i.e., everyGδ-subset ofX is open) if and only ifB1(X) = U(X). This extends a list of equivalences obtained earlier by Gillman and Henriksen,...
In this paper, we prove some weighted boundedness for the multilinear operators related to some singular integral operators with non-smooth kernels on the generalized Morrey spaces by using a sharp function estimate of the multilinear operators.
LetX be a real Banach space, letA:D(A) ⊆X →X be anm-dissipative operator, letI a nonempty, bounded interval And letK:I →D(A) be a given multi-valued function. By using the concept ofA-quasi-tangent set introduced by CârjĂ, Necula, Vrabie [8] And [9] And using a tangency condition expressed in the terms of this concept, we establish a necessary And sufficient condition forC0-viability referring to...
We show that which that for a Berwald structure, any Riemannian structure that is preserved by the Berwald connection leaves the indicatrix invariant under horizontal parallel transport. We also obtain the converse result: if (M,F) is a Finsler structure such that there exists a Riemannian structure that leaves invariant the indicatrix under parallel transport of the associated Levi-Civita connection,...
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