Results 11 to 20 of about 136,986 (279)

Exact Solutions and Degenerate Properties of Spin Chains with Reducible Hamiltonians

open access: yesCondensed Matter, 2018
The Jordan–Wigner transformation plays an important role in spin models. However, the non-locality of the transformation implies that a periodic chain of N spins is not mapped to a periodic or an anti-periodic chain of lattice fermions.
Shiung Fan
doaj   +3 more sources

Anti-Periodic Boundary Conditions in Supersymmetric DLCQ

open access: yes, 2000
It is of considerable importance to have a numerical method for solving supersymmetric theories that can support a non-zero central charge. The central charge in supersymmetric theories is in general a boundary integral and therefore vanishes when one uses periodic boundary conditions. One is therefore prevented from studying BPS states in the standard
Pinsky, S., Trittmann, U.
openaire   +3 more sources

The XXZ model with anti-periodic twisted boundary conditions [PDF]

open access: yesJournal of Physics A: Mathematical and Theoretical, 2009
22 pages and 3 ...
Niekamp, Sönke   +2 more
openaire   +3 more sources

Anti-periodic solutions for semilinear evolution equations

open access: yesJournal of Mathematical Analysis and Applications, 2002
The authors study the existence problem of anti-periodic solutions for the following first-order nonlinear evolution equation \[ \begin{cases} u'(t)+Au(t)+F(t,u(t))=0, &t\in\mathbb R\\ u(t+T)=-u(t), &t\in\mathbb R,\end{cases} \] in a Hilbert space \(H\), where \(A\) is a selfadjoint operator and \(F\) is a continuous nonlinear operator.
Chen, Yuqing   +2 more
openaire   +2 more sources

Fractional-order differential equations with anti-periodic boundary conditions: a survey

open access: yesBoundary Value Problems, 2017
We will present an up-to-date review on anti-periodic boundary value problems of fractional-order differential equations and inclusions. Some recent and new results on nonlinear coupled fractional differential equations supplemented with coupled anti ...
Ravi P Agarwal   +2 more
doaj   +1 more source

Anti-periodic solutions problem for inertial competitive neutral-type neural networks via Wirtinger inequality

open access: yesJournal of Inequalities and Applications, 2019
By using the Wirtinger inequality and topology degree theory, we investigate the anti-periodic solutions problem for inertial competitive neutral-type neural networks and obtain the existence of anti-periodic solutions to the above system.
Bo Du
doaj   +1 more source

Almost Anti-Periodic Oscillation Excited by External Inputs and Synchronization of Clifford-Valued Recurrent Neural Networks

open access: yesMathematics, 2022
The main purpose of this paper was to study the almost anti-periodic oscillation caused by external inputs and the global exponential synchronization of Clifford-valued recurrent neural networks with mixed delays.
Weiwei Qi, Yongkun Li
doaj   +1 more source

Existence theory for sequential fractional differential equations with anti-periodic type boundary conditions

open access: yesOpen Mathematics, 2016
We develop the existence theory for sequential fractional differential equations involving Liouville-Caputo fractional derivative equipped with anti-periodic type (non-separated) and nonlocal integral boundary conditions.
Aqlan Mohammed H.   +3 more
doaj   +1 more source

Anti-Synchronization of Fractional-Order Chaotic Circuit with Memristor via Periodic Intermittent Control

open access: yesAdvances in Mathematical Physics, 2020
In this paper, the anti-synchronization of fractional-order chaotic circuit with memristor (FCCM) is investigated via a periodic intermittent control scheme.
Fanqi Meng   +3 more
doaj   +1 more source

SEMI-BLOCH PERIODIC FUNCTIONS, SEMI-ANTI-PERIODIC FUNCTIONS AND APPLICATIONS

open access: yesChelyabinsk Physical and Mathematical Journal, 2020
We introduce the notions of semi-Bloch periodic functions and semi-anti-periodic functions. Stepanov semi-Bloch periodic functions and Stepanov semi-anti-periodic functions are considered, as well. We analyze the invariance of introduced classes under actions of convolution products and briefly explain how one can use the obtained results in the ...
Chaouchi, B.   +3 more
openaire   +2 more sources

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