Results 21 to 30 of about 3,017,157 (340)

Geometric Invariants of Surjective Isometries between Unit Spheres

open access: yesMathematics, 2021
In this paper we provide new geometric invariants of surjective isometries between unit spheres of Banach spaces. Let X,Y be Banach spaces and let T:SX→SY be a surjective isometry.
Almudena Campos-Jiménez   +1 more
doaj   +1 more source

An application of the Choquet theorem to the study of randomly-superinvariant measures [PDF]

open access: yesOpuscula Mathematica, 2012
Given a real valued random variable \(\Theta\) we consider Borel measures \(\mu\) on \(\mathcal{B}(\mathbb{R})\), which satisfy the inequality \(\mu(B) \geq E\mu(B-\Theta)\) (\(B \in \mathcal{B}(\mathbb{R})\)) (or the integral inequality \(\mu(B) \geq ...
Teresa Rajba
doaj   +1 more source

The Maximum Principle for Variable-Order Fractional Diffusion Equations and the Estimates of Higher Variable-Order Fractional Derivatives

open access: yesFrontiers in Physics, 2020
In this paper, the maximum principle of variable-order fractional diffusion equations and the estimates of fractional derivatives with higher variable order are investigated.
Guangming Xue   +5 more
doaj   +1 more source

Extreme-Point-based Heuristics for the Three-Dimensional Bin Packing problem [PDF]

open access: yes, 2008
One of the main issues in addressing three-dimensional packing problems is finding an efficient and accurate definition of the points at which to place the items inside the bins, because the performance of exact and heuristic solution methods is actually
Crainic T. G.   +9 more
core   +1 more source

Strongly extreme points and approximation properties [PDF]

open access: yes, 2017
We show that if $x$ is a strongly extreme point of a bounded closed convex subset of a Banach space and the identity has a geometrically and topologically good enough local approximation at $x$, then $x$ is already a denting point. It turns out that such
Abrahamsen, Trond A.   +3 more
core   +2 more sources

Questions About Extreme Points

open access: yesIntegral Equations and Operator Theory, 2023
AbstractWe discuss the geometry of the unit ball—specifically, the structure of its extreme points (if any)—in subspaces of$$L^1$$L1and$$L^\infty $$L∞on the circle that are formed by functions with prescribed spectral gaps. A similar issue is considered for kernels of Toeplitz operators in$$H^\infty $$H∞.
openaire   +4 more sources

Evaluating carbon-electrode dielectrophoresis under the ASSURED criteria

open access: yesFrontiers in Medical Technology, 2022
Extreme point-of-care refers to medical testing in unfavorable conditions characterized by a lack of primary resources or infrastructure. As witnessed in the recent past, considerable interest in developing devices and technologies exists for extreme ...
Rodrigo Martinez-Duarte   +3 more
doaj   +1 more source

𝐶*-extreme points [PDF]

open access: yesTransactions of the American Mathematical Society, 1981
Let A \mathcal {A} be a C ∗ {C^ \ast } -algebra and let S \mathcal {S} be a subset of A \mathcal {A} . S \mathcal {S} is C ∗ {C^ \ast
Alan Hopenwasser   +2 more
openaire   +1 more source

Possible impact of urbanization on extreme precipitation–temperature relationship in East Asian megacities

open access: yesWeather and Climate Extremes, 2021
This study investigates the possible impact of urbanization on the summertime extreme precipitation–temperature (P–T) relationship in East Asia. The local climate in three megacity regions—Guangdong in China, Seoul/Gyeonggi in Korea, and Tokyo in Japan ...
Seok-Geun Oh, Seok-Woo Son, Seung-Ki Min
doaj   +1 more source

New Rotation Sets in a Family of Torus Homeomorphisms [PDF]

open access: yes, 2015
We construct a family $\{\Phi_t\}_{t\in[0,1]}$ of homeomorphisms of the two-torus isotopic to the identity, for which all of the rotation sets $\rho(\Phi_t)$ can be described explicitly.
Boyland, Philip   +2 more
core   +2 more sources

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