Results 71 to 80 of about 79,761 (304)
The out-degree and in-degree topological potentials with σopt = 1.886.
, 2023 The out-degree and in-degree topological potentials with σopt = 1.886.
Lianghai Jin (14817689) +1 more
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Existence of solutions for Kirchhoff-type problems via the method of lower and upper solutions
Electronic Journal of Differential Equations, 2019 This article considers elliptic problems of Kirchhoff-type. We give some new definitions of lower and upper solutions for the problem and establish the method of lower and upper solutions when the upper and lower solutions are well ordered, i.e., the ...
Baoqiang Yan +2 more
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Exploring Curvature Effects in Direct‐Written 3D Curved Hollow Magnetic Nanoshells
Advanced Functional Materials, EarlyView.Fabricated by a hybrid FEBID/CVD method, 3D PtC/Co3Fe core–shell heterostructures with engineered curvature and shell thickness exhibit complex reversal modes with axially symmetric N'eel‐type domain walls. XMCD‐PEEM combined with full‐scale micromagnetic simulations reveal how curvature and thickness govern the domain wall energy landscape and shape ...
Oleksii M. Volkov +10 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Moiré band engineering in graphene/hexagonal boron nitride–based superlattices unlocks van Hove singularities (VHSs) for terahertz (THz) optoelectronics. Tuning the Fermi level near these singularities, associated with secondary neutrality points (SNPs), enhances the photothermoelectric response.
Leonid Elesin +16 more
wiley +1 more source
An Algebraic Index Theorem for Non-smooth Economies [PDF]
In this paper, we prove an existence theorem for equilibria in production economies with increasing returns, which generalizes the classic results on this topic.
Gaël Giraud
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Computing topological degree using noisy information
, 1990 This paper addresses the problem of computing topological degree of Lipschitz functions with the use of noisy evaluations of function values as information. Two bounds on the noise are considered: (i) absolute and (ii) relative.
Yokoyama, Misako
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Extremal Topological Indices with Prescribed Degree Sequences
Vestnik KRAUNC: Fiziko-Matematičeskie NaukiThis paper explores the extremal properties and bounds of two significant topological indices in graph theory: the Albertson and Sigma indices, with an emphasis on trees and bipartite graphs.
Hamoud, J., Belov, A.Ya.
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Mathematics, 2020 In this paper, we study the existence of nontrivial solutions for a system of fractional q-difference equations involving q-integral boundary conditions, and we use the topological degree to establish our main results by considering the first eigenvalue ...
Yaohong Li +3 more
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Advanced Functional Materials, EarlyView.Schematic illustration of ferroelectric‐intercalation‐driven transitions in magnetic configurations and magnonic topological phases, together with the symmetry relations of magnonic Berry curvature. ABSTRACT Magnons in collinear magnets with vanishing net magnetization offer unique advantages for spin transport, including ultrafast dynamics and ...
Yingxi Bai +8 more
wiley +1 more source
In this paper we introduce a new concept, that of hybrid base, which is a maximal circuitless and cutsetless subset of a graph. Although this concept of simultaneous circuitlessness and cutsetlessness has been used in proofs of some theorems in so called
Gibbons, Alan, Novak, Ladislav
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