Results 41 to 50 of about 237,552 (328)

The number of rational points of some classes of algebraic varieties over finite fields

open access: yesOpen Mathematics
Let Fq{{\mathbb{F}}}_{q} be the finite field of characteristic pp and Fq*=Fq\{0}{{\mathbb{F}}}_{q}^{* }\left={{\mathbb{F}}}_{q}\backslash \left\{0\right\}.
Zhu Guangyan   +3 more
doaj   +1 more source

Nonlinear elliptic problems with the method of finite volumes

open access: yesDifferential Equations and Nonlinear Mechanics, 2006
We present a finite volume discretization of the nonlinear elliptic problems. The discretization results in a nonlinear algebraic system of equations.
Sanjay Kumar Khattri
doaj   +1 more source

Phenomenological rate-independent uniaxial hysteretic models: A mini-review

open access: yesFrontiers in Built Environment, 2022
A great variety of phenomenological models has been proposed over the years to model rate-independent hysteretic forces in structural mechanics. The classification of such models is usually based on the type of equation that needs to be solved to ...
Raffaele Capuano   +2 more
doaj   +1 more source

Review of Memristors for In‐Memory Computing and Spiking Neural Networks

open access: yesAdvanced Intelligent Systems, EarlyView.
Memristors uniquely enable energy‐efficient, brain‐inspired computing by acting as both memory and synaptic elements. This review highlights their physical mechanisms, integration in crossbar arrays, and role in spiking neural networks. Key challenges, including variability, relaxation, and stochastic switching, are discussed, alongside emerging ...
Mostafa Shooshtari   +2 more
wiley   +1 more source

Geometry on arc spaces of algebraic varieties

open access: yes, 2000
This paper is a survey on arc spaces, a recent topic in algebraic geometry and singularity theory. The geometry of the arc space of an algebraic variety yields several new geometric invariants and brings new light to some classical invariants.Comment: 22
Denef, J., Loeser, F.
core   +3 more sources

Efficient Dynamics: Reduced‐Order Modeling of the Time‐Dependent Schrödinger Equation

open access: yesAdvanced Physics Research, EarlyView.
Reduced‐order modeling (ROM) approaches for the time‐dependent Schrödinger equation are investigated, highlighting their ability to simulate quantum dynamics efficiently. Proper Orthogonal Decomposition, Dynamic Mode Decomposition, and Reduced Basis Methods are compared across canonical systems and extended to higher dimensions.
Kolade M. Owolabi
wiley   +1 more source

Model companion properties of some theories

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы
The class K of algebraic systems of signature σ is called a formula-definable class if there exists an algebraic system A of signature σ such that for any algebraic system B of signature σ it is B ∈ K if and only if Th(B) · Th(A) = Th(A).
А. Кабиденов   +3 more
doaj   +1 more source

Fundamental groups of symplectic singularities [PDF]

open access: yes, 2013
Let (X, \omega) be an affine symplectic variety. Assume that X has a C^*-action with positive weights and \omega is homogeneous with respect to the C^*-action. We prove that the algebraic fundamental group of the smooth locus X_{reg} is finite. This is a
Namikawa, Yoshinori
core  

Algebraic Correspondences between Algebraic Varieties

open access: yesJournal of the Mathematical Society of Japan, 1951
Über dem komplexen Zahlkörper als Konstantenkörper werden zwei vollständige (complete) MannigfaItigkeiten \(U\) und \(V\) betrachtet. Ein Divisor \(X\) von \(U\times V\) wird \glqq Korrespondenz\grqq{} zwischen \(U\) und \(V\) genannt. \(X\) heißt von der Wertigkeit \(0\), wenn er die Form besitzt: \(X = Y_1 \times U\times Y_2 + (\varphi)\), wo \(Y_1\)
openaire   +3 more sources

A compatibility criterion for optimal control and information aggregation in hierarchical network systems

open access: yesAsian Journal of Control, EarlyView.
Abstract Large swarms often adopt a hierarchical network structure that incorporates information aggregation. Although this approach offers significant advantages in terms of communication efficiency and computational complexity, it can also lead to degradation due to information constraints.
Kento Fujita, Daisuke Tsubakino
wiley   +1 more source

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