Results 31 to 40 of about 1,317,799 (362)

Exact Zoning Optimization Model for Marine Spatial Planning (MSP)

open access: yesFrontiers in Marine Science, 2021
Marine spatial planning (MSP) has recently attracted more attention as an efficient decision support tool. MSP is a strategic and long-term process gathering multiple competing users of the ocean with the objective to simplify decisions regarding the ...
Mohadese Basirati   +3 more
doaj   +1 more source

Neither ordinary nor global: a reflection on the ‘extra-ordinary’ expansion of Athens

open access: yesUrban, Planning and Transport Research, 2014
As part of the debate on Mediterranean urbanities in between ‘ordinary’ and ‘global’ cities, the present paper proposes a reflection on Athens’ long-term expansion seen as a paradigmatic example of urban development in southern Europe.
Luca Salvati
doaj   +1 more source

Sufficient conditions for the precompactness of sets in Local Morrey-type spaces

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2018
In this paper we give sufficient conditions for the pre-compactness of sets in local Morrey-type spaces LMpθ,w(·)(Rn). For w(r) = r−λ, θ = ∞, 0 ≤ λ ≤ np there follows a known result for the Morrey spacesMλp (Rn). In the case λ = 0 this is the well-known
D.T. Matin   +2 more
doaj   +1 more source

A topological model for partial equivariance in deep learning and data analysis

open access: yesFrontiers in Artificial Intelligence, 2023
In this article, we propose a topological model to encode partial equivariance in neural networks. To this end, we introduce a class of operators, called P-GENEOs, that change data expressed by measurements, respecting the action of certain sets of ...
Lucia Ferrari   +3 more
doaj   +1 more source

Quark Stars in Generalized Hybrid Metric-Palatini Gravity [PDF]

open access: yesIranian Journal of Astronomy and Astrophysics
We investigate the physical properties of quark stars with two different equations of state in generalized hybrid metric-Palatini gravity. This theory corresponds to a bi-scalar gravitational theory with two non-minimally-coupled scalar fields.The field ...
Reyhaneh Aliannejadi, Zahra Haghani
doaj   +1 more source

Existence of solutions for critical Choquard equations via the concentration-compactness method [PDF]

open access: yesProceedings of the Royal Society of Edinburgh: Section A Mathematics, 2017
In this paper, we consider the nonlinear Choquard equation $$-\Delta u + V(x)u = \left( {\int_{{\open R}^N} {\displaystyle{{G(u)} \over { \vert x-y \vert ^\mu }}} \,{\rm d}y} \right)g(u)\quad {\rm in}\;{\open R}^N, $$ where 0 < μ < N, N ⩾ 3, g(u) is of ...
Fashun Gao   +3 more
semanticscholar   +1 more source

A compact group which is not Valdivia compact [PDF]

open access: yesProceedings of the American Mathematical Society, 2005
A compact space $K$ is {\em Valdivia compact} if it can be embedded in a Tikhonov cube $I^A$ in such a way that the intersection $K\cap $ is dense in $K$, where $ $ is the sigma-product (= the set of points with countably many non-zero coordinates).
Vladimir V. Uspenskij, Wieslaw Kubis
openaire   +5 more sources

Pincherle's theorem in Reverse Mathematics and computability theory

open access: yes, 2020
We study the logical and computational properties of basic theorems of uncountable mathematics, in particular Pincherle's theorem, published in 1882. This theorem states that a locally bounded function is bounded on certain domains, i.e. one of the first
Normann, Dag, Sanders, Sam
core   +1 more source

Weak Continuity and Compactness for Nonlinear Partial Differential Equations [PDF]

open access: yes, 2015
We present several examples of fundamental problems involving weak continuity and compactness for nonlinear partial differential equations, in which compensated compactness and related ideas have played a significant role.
Chen, Gui-Qiang G.
core   +1 more source

Application of the averaging method to the problems of optimal control of the impulse systems

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2020
The problem of optimal control at finite time interval for a system of differential equations with impulse action at fixed moments of time as well as the corresponding averaged system of ordinary differential equations are considered. It is proved the
T.V. Koval'chuk   +3 more
doaj   +1 more source

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