Safwan S A,Elmeshed N,Asmaa A S,et al.Theoretical study of positive and negative donor impurity in quantum dot quantum well limit and quantum wire limit. Physica B Condensed Matter . 2010Safwan, SA,El Meshed, N,Asmaa, AS,Hekmat, MH. Theoretical study of positive and negative donor ...
By using the monotonicity of the function and the relationship between the limit value and the zero at the end point, three sufficient conditions for the positive and negative properties of the judgment function f(x) on the interval (a, b) are deduced, and finally through the three examples...
In (Comm. Math. Phys. 188 (1997) 121–133) Herzlich proved a new positive mass theorem for Riemannian 3-manifolds (,) whose mean curvature of the boundary allows some positivity. In this paper we study what happens to the limit case of the theorem when, at a point of the boundary, ...
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In this paper the notion of likelihood ratio, as a measure of deviation between a sequence of the integer-valued variables with negative binomial distrbution, is introduced. A subset of the sample space is given by restricting the likelihood ratio, and on this subset a class of limit theorems...
Positive Pinching Let M be a closed simply connected manifold and 0 0 \\) such that the injectivity radius of any Riemannian metric g on M with \\( \\delta \\le {K_g} \\le 1 \\) can be estimated from below by i 0. We study this question by collapsing and... A Petrunin,X...
Surround yourself with positive people: Spending time with positive people can help to raise your vibration and to protect you from negative energy. 与积极的人在一起:与积极的人共度时光可以帮助提高您的振动并保护您免受负能量的侵害。 If you are struggling to deal with negative energy, it is imp...
Givenϵ>0, we want to findδ>0such that if∣x−0∣=∣x∣<∣δ∣then∣x1−5∣<ϵ. Of course,∣x1−5∣=∣x1−5x∣so, if x is positive,∣x1−5∣<ϵ... Is this a valid use of l'Hospital's Rule? Can it be used recursively?
The nature and distribution of O- containing functional groups decide the charge characteristics of the functional group, i.e., positive or negatively charged (Tomczyk et al., 2020). Banik et al. (2018) reported that the negative surface charge could only be due to the carboxylate and phenol...
Let Σ be a compact three-manifold with non-positive Yamabe invariant. We prove that in any long time constant mean curvature Einstein flow over Σ, having... M Reiris - 《General Relativity & Gravitation》 被引量: 23发表: 2009年 加载更多研究...