Results 31 to 40 of about 11,363,143 (293)

Topological order in Josephson junction ladders with Mobius boundary conditions [PDF]

, 2005
We propose a CFT description for a closed one-dimensional fully frustrated ladder of quantum Josephson junctions with Mobius boundary conditions, in particular we show how such a system can develop topological order.
Adele Naddeo, Affleck I, Cristofano G, Cristofano G, Cristofano G Marotta V Naddeo A Niccoli G, Di Francesco P, Doucot B Feigel?man M V Ioffe L B Ioselevich A S, Gerardo Cristofano, Grimm U, Marotta V, Nishiyama Y, Vincenzo Marotta, Wen X G   +12 more
core   +3 more sources

A class of explicit second derivative general linear methods for non-stiff ODEs

Mathematical Modelling and Analysis
In this paper, we construct explicit second derivative general linear methods (SGLMs) with quadratic stability and a large region of absolute stability for the numerical solution of non-stiff ODEs.
Mohammad Sharifi, Ali Abdi, Michal Braś, Gholamreza Hojjati   +3 more
doaj   +1 more source

First-Order Query Evaluation with Cardinality Conditions

, 2017
We study an extension of first-order logic that allows to express cardinality conditions in a similar way as SQL's COUNT operator. The corresponding logic FOC(P) was introduced by Kuske and Schweikardt (LICS'17), who showed that query evaluation for this
Abiteboul S., Flum J., J., Kreutzer S., Segoufin L.   +4 more
core   +1 more source

Explicit Runge–Kutta–Nyström-Type Schemes for Fourth-Order Systems y⁽⁴⁾=f (x, y, y^′)

Axioms
This work addresses the numerical solution of fourth-order initial value problems of the form y(4)=f(x,y,y′), extending the capabilities of standard Runge–Kutta–Nyström (RKN) methods which are typically limited to y(4)=f(x,y). Problems of this type arise
Rubayyi T. Alqahtani, Theodore E. Simos, Charalampos Tsitouras   +2 more
doaj   +1 more source

Implicit first order differential systems with nonlocal conditions

Electronic Journal of Qualitative Theory of Differential Equations, 2015
The present paper is devoted to the existence of solutions for implicit first order differential systems with nonlocal conditions expressed by continuous linear functionals. The lack of complete continuity of the associated integral operators, due to the
Octavia Bolojan (Nica), Radu Precup
doaj   +1 more source

Fractional-Order Variational Calculus with Generalized Boundary Conditions

Advances in Difference Equations, 2011
This paper presents the necessary and sufficient optimality conditions for fractional variational problems involving the right and the left fractional integrals and fractional derivatives defined in the sense of Riemman-Liouville with a Lagrangian ...
Mohamed A. E. Herzallah, Dumitru Baleanu
doaj   +2 more sources

New high order sufficient conditions for configuration tracking

, 2015
In this paper, we propose new conditions guaranteeing that the trajectories of a mechanical control system can track any curve on the configuration manifold.
Barbero-Liñán, M., Sigalotti, M.
core   +3 more sources

On rational boundary conditions for higher-order long-wave models [PDF]

, 2008
Higher-order corrections to classical long-wave theories enable simple and efficient modelling of the onset of wave dispersion and size effects produced by underlying micro-structure.
AL Goldenveiser, AV Metrikine, AV Pichugin, I Andrianov, JD Kaplunov, L. Brillouin   +5 more
core   +1 more source

Coefficient Conditions for Starlikeness of Nonnegative Order

Abstract and Applied Analysis, 2012
Sufficient conditions on a sequence {ak} of nonnegative numbers are obtained that ensures f(z)=∑k=1∞akzk is starlike of nonnegative order in the unit disk. A result of Vietoris on trigonometric sums is extended in this pursuit.
Rosihan M. Ali, See Keong Lee, Saiful R. Mondal   +2 more
doaj   +1 more source

Second order systems with nonlinear nonlocal boundary conditions

Electronic Journal of Qualitative Theory of Differential Equations, 2018
This paper is concerned with the second order differential equation with not necessarily linear nonlocal boundary condition. The existence of solutions is obtained using the properties of the Leray–Schauder degree. The results generalize and improve some
Jean Mawhin, Bogdan Przeradzki, Katarzyna Szymanska-Debowska   +2 more
doaj   +1 more source