Results 71 to 80 of about 1,030,362 (113)

Maximum principle for a nonlinear size-structured model of fish and fry management

Nonlinear Analysis, 2018
This paper investigates the maximum principle for a nonlinear size-structured model that describes the optimal management of the fish resources taking into account harvesting the fish and putting the fry.
Rong Liu, Guirong Liu
doaj   +1 more source

Using the quantum probability ranking principle to rank interdependent documents [PDF]

, 2010
A known limitation of the Probability Ranking Principle (PRP) is that it does not cater for dependence between documents. Recently, the Quantum Probability Ranking Principle (QPRP) has been proposed, which implicitly captures dependencies between ...
Azzopardi, L., Leif Azzopardi, Guido Zuccon, Zuccon, G., Azzopardi, Leif, Zuccon, Guido   +5 more
core   +3 more sources

Ekeland's principle for cyclically antimonotone equilibrium problems

, 2016
In this paper, we deal with equilibrium problems without convexity assumptions either for the domain or for the function involved. First we give an Ekeland's variational principle for equilibrium problems on complete metric spaces which generalizes some ...
GIULI, MASSIMILIANO, CASTELLANI, MARCO
core   +1 more source

On the Epistemology of the Precautionary Principle [PDF]

, 2014
In this paper we present two distinctly epistemological puzzles that arise forone who aspires to defend the precautionary principle. The first puzzle involves anapplication of contextualism in epistemology; and the second puzzle concerns the task of ...
Carter, J.A., Carter, JA Adam, Carter, J. Adam, Peterson, MB Martin, Peterson, Martin, Peterson, M.B.   +5 more
core   +2 more sources

Concerning Kirk’s problem

Fixed Point Theory and Algorithms for Sciences and Engineering
This paper presents a straightforward statement for Khamsi’s theorem without assuming continuity or nondecreasing restrictions on η. Additionally, a new proof provides an affirmative answer to Kirk’s problem, supported by examples.
Hamid Mottaghi Golshan
doaj   +1 more source

The Variational Principle and Fixed Point Theorems in Certain Topological Spaces [PDF]

, 1996
The main purpose of this paper is to introduce the concept ofF-type topological spaces and to establish a variational principle and a fixed point theorem in the kind of spaces, which extend Ekeland's variational principle and Caristi's fixed point ...
Fang, Jin-Xuan
core   +1 more source

Nash-type equilibria and periodic solutions to nonvariational systems

Advances in Nonlinear Analysis, 2014
The paper deals with variational properties of fixed points for contraction-type operators. Under suitable conditions, the unique fixed point of a vector-valued operator is a Nash-type equilibrium of the corresponding energy functionals. This is achieved
Precup Radu
doaj   +1 more source

The quantum probability ranking principle for information retrieval [PDF]

, 2009
While the Probability Ranking Principle for Information Retrieval provides the basis for formal models, it makes a very strong assumption regarding the dependence between documents.
Van Rijsbergen, C., Azzopardi, L., Guido Zuccon, Zuccon, G., Keith van Rijsbergen, Zuccon, Guido, Leif A. Azzopardi, Azzopardi, Leif A., van Rijsbergen, Keith   +8 more
core   +3 more sources

Pontryagin's maximum principle for constrained impulsive control problems

, 2020
Necessary conditions in the form of Pontryagin's maximum principle are derived for impulsive control problems with mixed constraints. A new mathematical concept of impulsive control is introduced as a requirement for the consistency of the impulsive ...
Karamzin D.Yu., Arutyunov A.V., Pereira F.   +2 more
core   +2 more sources

On a complement to Ekeland's variational principle

, 1997
We give a sufficient condition to a closed convex hull of the set of the Ekeland's points of a certain lower semicontinuous function defined on a real Banach space X coincides with ...
CHINNI', Antonia
core   +1 more source