Results 21 to 30 of about 120,378 (265)
On the Mean 3-Rank of Quadratic Fields [PDF]
Compositio Mathematica, 1999 The Cohen–Lenstra–Martinet heuristics give precise predictions about the class groups of a ’random‘ number field. The 3-rank of quadratic fields is one of the few instances where these have been proven. We prove that, in this case, the rate of convergence is at least sub-exponential.
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The Generalized Quadratic Gauss Sum and Its Fourth Power Mean
Mathematics, 2019 In this article, our main purpose is to introduce a new and generalized quadratic Gauss sum. By using analytic methods, the properties of classical Gauss sums, and character sums, we consider the calculating problem of its fourth power mean and give two ...
Shimeng Shen, Wenpeng Zhang
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Approximate tri-quadratic functional equations via Lipschitz conditions [PDF]
Mathematica Bohemica, 2017 In this paper, we consider Lipschitz conditions for tri-quadratic functional equations. We introduce a new notion similar to that of the left invariant mean and prove that a family of functions with this property can be approximated by tri-quadratic ...
Ismail Nikoufar
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Sharp bounds for Neuman means in terms of geometric, arithmetic and quadratic means [PDF]
Journal of Mathematical Inequalities, 2016 11 ...
Guo, Zhi-Jun +3 more
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Sharp bounds for Neuman means in terms of two-parameter contraharmonic and arithmetic mean
Journal of Inequalities and Applications, 2019 In the article, we prove that λ1=1/2+[(2+log(1+2))/2]1/ν−1/2 $\lambda _{1}=1/2+\sqrt{ [ (\sqrt{2}+ \log (1+\sqrt{2}) )/2 ]^{1/\nu }-1}/2$, μ1=1/2+6ν/(12ν) $\mu _{1}=1/2+\sqrt{6 \nu }/(12\nu )$, λ2=1/2+[(π+2)/4]1/ν−1/2 $\lambda _{2}=1/2+\sqrt{ [(\pi +2)/4
Wei-Mao Qian +3 more
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Electronic Journal of Qualitative Theory of Differential Equations, 2008 The paper studies the notion of Stepanov almost periodicity (or $S^2$-almost periodicity) for stochastic processes, which is weaker than the notion of quadratic-mean almost periodicity.
P. Bezandry, Toka Diagana
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MSE in Estimating Variance Components [PDF]
The Egyptian Statistical Journal, 1992 Best unbiased estimators for the variance of the MINQUE (Minimum Norm Quadratic Unbiased Estimators) and the MSE (Mean Square Error) of the PSD-MINQMBE (Positive Semi Definite- Minimum Norm Quadratic Unbiased Estimators), in estimating the variance ...
A. Shaban
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Quadratic refinements of matrix means [PDF]
Studia Universitatis Babes-Bolyai Matematica, 2017 The main target of this article is to present refinements of the matrix arithmetic-geometric mean inequality. The main difference between these refinements and the ones in the literature is the quadratic behavior of the refining terms. These refinements include the L\"{o}ewner partial ordering, determinants, trace and unitarily invariant norms ...
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Quadratic BSDEs with mean reflection
Mathematical Control and Related Fields, 2018 The present paper is devoted to the study of the well-posedness of BSDEs with mean reflection whenever the generator has quadratic growth in the $z$ argument. This work is the sequel of Briand et al. [BSDEs with mean reflection, arXiv:1605.06301] in which a notion of BSDEs with mean reflection is developed to tackle the super-hedging problem under ...
Hibon, Hélène +4 more
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Estimators Proposed by Geometric Mean, Harmonic Mean and Quadratic Mean [PDF]
Science Journal of Applied Mathematics and Statistics, 2016 In the studies in literature up to date arithmetic population mean of auxiliary variable is used to obtain the proportional estimators. In this paper geometric mean, harmonic mean and quadratic mean is used as well as arithmetic population mean. Using geometric mean, harmonic mean and quadratic mean do not affect the variance of ratio estimator ...
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