Results 21 to 30 of about 203,139 (278)

On the Lq-reflector problem in ℝn with non-Euclidean norm

open access: yesAdvanced Nonlinear Studies, 2022
In this article, we introduce a class of geometric optics measure-the LqΣ{L}_{q}\hspace{0.33em}\Sigma -reflector measure which arises from an Lq{L}_{q} extension of the Σ\Sigma -reflector measure.
Wang Jing
doaj   +1 more source

An overdetermined problem for the anisotropic capacity [PDF]

open access: yes, 2016
We consider an overdetermined problem for the Finsler Laplacian in the exterior of a convex domain in $\mathbb{R}^N$, establishing a symmetry result for the anisotropic capacitary potential. Our result extends the one of W. Reichel [Arch.
Bianchini, Chiara   +2 more
core   +2 more sources

A short proof of the infinitesimal Hilbertianity of the weighted Euclidean space

open access: yesComptes Rendus. Mathématique, 2020
We provide a quick proof of the following known result: the Sobolev space associated with the Euclidean space, endowed with the Euclidean distance and an arbitrary Radon measure, is Hilbert.
Di Marino, Simone   +2 more
doaj   +1 more source

On the norms and Hadamard product of Toeplitz matrices involving Leonardo numbers [PDF]

open access: yesMathematica Moravica
In this study, we consider the Toeplitz matrices with entries being Leonardo numbers. We have found upper and lower bounds for the spectral norms of these matrices, considering also the Hadamard product of this type of matrix.
Catarino Paula   +4 more
doaj   +1 more source

Some generalized Euclidean and 2-stage Euclidean number fields that are not norm-Euclidean [PDF]

open access: yesMathematics of Computation, 2011
We give examples of Generalized Euclidean but not norm-Euclidean number fields of degree greater than 2. In the same way we give examples of 2-stage Euclidean but not norm-Euclidean number fields of degree greater than 2. In both cases, no such examples were known.
openaire   +2 more sources

The Pólya-Szegö Principle and the Anisotropic Convex Lorentz-Sobolev Inequality

open access: yesThe Scientific World Journal, 2014
An anisotropic convex Lorentz-Sobolev inequality is established, which extends Ludwig, Xiao, and Zhang’s result to any norm from Euclidean norm, and the geometric analogue of this inequality is given.
Shuai Liu, Binwu He
doaj   +1 more source

A New Proof of the Pythagorean Theorem and Its Application to Element Decompositions in Topological Algebras

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2012
We present a new proof of the Pythagorean theorem which suggests a particular decomposition of the elements of a topological algebra in terms of an “inverse norm” (addressing unital algebraic structure rather than simply vector space structure).
Fred Greensite
doaj   +1 more source

A Wave-function for Stringy Universes [PDF]

open access: yes, 2007
We define a wave-function for string theory cosmological backgrounds. We give a prescription for computing its norm following an earlier analysis within general relativity.
  +25 more
core   +3 more sources

On Skew Circulant Type Matrices Involving Any Continuous Fibonacci Numbers

open access: yesAbstract and Applied Analysis, 2014
Circulant and skew circulant matrices have become an important tool in networks engineering. In this paper, we consider skew circulant type matrices with any continuous Fibonacci numbers.
Zhaolin Jiang, Jinjiang Yao, Fuliang Lu
doaj   +1 more source

Eigenvalue bounds for non-self-adjoint Schr\"odinger operators with non-trapping metrics [PDF]

open access: yes, 2019
We study eigenvalues of non-self-adjoint Schr\"odinger operators on non-trapping asymptotically conic manifolds of dimension $n\ge 3$. Specifically, we are concerned with the following two types of estimates.
Guillarmou, Colin   +2 more
core   +2 more sources

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