Results 21 to 30 of about 4,548,219 (290)

New half-discrete Hilbert inequalities for three variables

open access: yesJournal of Inequalities and Applications, 2018
In this paper, we obtain two new half-discrete Hilbert inequalities for three variables. The obtained inequalities are with the best constant factor. Moreover, we give their equivalent forms.
Tserendorj Batbold, Laith E. Azar
doaj   +1 more source

On number fields with equivalent integral trace forms [PDF]

open access: yes, 2011
Let $K$ be a number field. The \textit{integral trace form} is the integral quadratic form given by $\text{tr}_{K/\mathbb{Q}}(x^2)|_{O_{K}}.$ In this article we study the existence of non-conjugated number fields with equivalent integral trace forms.
Mantilla-Soler, Guillermo
core   +1 more source

On a more accurate half-discrete Hardy-Hilbert-type inequality related to the kernel of exponential function

open access: yesJournal of Inequalities and Applications, 2016
By applying the weight functions, the technique of real analysis and Hermite-Hadamard’s inequality, a half-discrete Hardy-Hilbert-type inequality related to the kernel of exponential function with the best possible constant factor expressed by the gamma ...
Jianquan Liao, Bicheng Yang
doaj   +1 more source

On a more accurate Hardy-Mulholland-type inequality

open access: yesJournal of Inequalities and Applications, 2017
By using the way of weight coefficients, the technique of real analysis, and Hermite-Hadamard’s inequality, a more accurate Hardy-Mulholland-type inequality with multi-parameters and a best possible constant factor is given.
Bicheng Yang, Qiang Chen
doaj   +1 more source

Concurrent investigation of global motion and form processing in amblyopia: an equivalent noise approach [PDF]

open access: yes, 2016
PURPOSE: Directly comparing the motion and form processing in neurologic disorders has remained difficult due to the limitations in the experimental stimulus.
Jeon, Seong T.   +2 more
core   +3 more sources

A more accurate Mulholland-type inequality in the whole plane

open access: yesJournal of Inequalities and Applications, 2017
By introducing independent parameters, applying the weight coefficients, and Hermite-Hadamard’s inequality, we give a more accurate Mulholland-type inequality in the whole plane with a best possible constant factor. Furthermore, the equivalent forms, the
Yanru Zhong, Bicheng Yang, Qiang Chen
doaj   +1 more source

On a more accurate Hilbert-type inequality in the whole plane with the general homogeneous kernel

open access: yesJournal of Inequalities and Applications, 2021
By the use of the weight coefficients, the idea of introduced parameters and the technique of real analysis, a more accurate Hilbert-type inequality in the whole plane with the general homogeneous kernel is given, which is an extension of the more ...
Xingshou Huang, Bicheng Yang
doaj   +1 more source

A more accurate half-discrete Hardy-Hilbert-type inequality with the logarithmic function

open access: yesJournal of Inequalities and Applications, 2017
By means of the weight functions, the technique of real analysis and Hermite-Hadamard’s inequality, a more accurate half-discrete Hardy-Hilbert-type inequality related to the kernel of logarithmic function and a best possible constant factor is given ...
Aizhen Wang, Bicheng Yang
doaj   +1 more source

The Equivalence of Quadratic Forms [PDF]

open access: yesCanadian Journal of Mathematics, 1957
The main object of this paper is to find the number of classes in a genus of indefinite quadratic forms, with integral coefficients, in k ≥ 4 variables, distinguishing for even k two cases, according as improper equivalence is or is not admitted.
openaire   +2 more sources

Closed-form representation for equivalent electromagnetic parameters of irregular hexagonal honeycomb radar-absorbing materials

open access: yesAIP Advances, 2021
In this study, a new closed-form expression is developed to determine the equivalent electromagnetic parameters (permittivity and permeability) of biaxial anisotropic honeycomb radar-absorbing materials (RAMs).
Guanya Li   +8 more
doaj   +1 more source

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