Results 21 to 30 of about 362,488 (307)

On sums of narrow operators on Köthe function spaces

open access: bronzeJournal of Mathematical Analysis and Applications, 2013
Abstract We find necessary and sufficient conditions on a Kothe Banach space E on [ 0 , 1 ] and a Banach space X under which a sum of two narrow operators from E to X is narrow. Using this condition, we prove that, given a Kothe Banach space E on [ 0 , 1 ] , there exist a Banach space X and ...
Volodymyr Mykhaylyuk, M. M. Popov
openalex   +3 more sources

Robot-assisted Minimally Invasive Management of a Calcified Mandibular Lateral Incisor: A Case Report [PDF]

open access: yesInternational Dental Journal
Introduction and aims: Calcified root canals in mandibular anterior teeth present significant therapeutic challenges due to their narrow anatomy and minimal tolerance for procedural errors.
Yuxin Liu   +4 more
doaj   +2 more sources

On linear sections of orthogonally additive operators

open access: yesМатематичні Студії, 2022
Our first result asserts that, for linear regular operators acting from a Riesz space with the principal projection property to a Banach lattice with an order continuous norm, the $C$-compactness is equivalent to the $AM$-compactness. Next we prove that,
A. Gumenchuk, I. Krasikova, M. Popov
doaj   +1 more source

The “Second Derivative” of a Non-Differentiable Function and its Use in Interval Optimization Methods

open access: yesJournal of Telecommunications and Information Technology, 2023
The paper presents an idea to use weak derivatives in interval global optimization. It allows using the Newton operator to narrow domains of non-differentiable functions. Preliminary computational experiments are also presented.
Bartłomiej Jacek Kubica
doaj   +1 more source

Adaptive dating and fast proposals: Revisiting the phylogenetic relaxed clock model.

open access: yesPLoS Computational Biology, 2021
Relaxed clock models enable estimation of molecular substitution rates across lineages and are widely used in phylogenetics for dating evolutionary divergence times.
Jordan Douglas   +2 more
doaj   +1 more source

Narrow operators and the Daugavet property for ultraproducts [PDF]

open access: yesPositivity, 2005
We show that if $T$ is a narrow operator on $X=X_{1}\oplus_{1} X_{2}$ or $X=X_{1}\oplus_{\infty} X_{2}$, then the restrictions to $X_{1}$ and $X_{2}$ are narrow and conversely. We also characterise by a version of the Daugavet property for positive operators on Banach lattices which unconditional sums of Banach spaces inherit the Daugavet property, and
Dmitriy Bilik   +3 more
openaire   +3 more sources

Feeding the world in a narrowing safe operating space

open access: yesOne Earth, 2021
Current world agriculture leads to planetary-boundary transgressions. Although achieving global food security within these environmental bounds is possible through sustainable transformations of the food system, Earth-system feedbacks could increasingly narrow the maneuvering space.
Dieter Gerten   +2 more
openaire   +4 more sources

Widening and narrowing operators for abstract interpretation [PDF]

open access: yesComputer Languages, Systems & Structures, 2011
Abstract Interpretation, one of the most applied techniques for semantics based static analysis of software, is based on two main key-concepts: the correspondence between concrete and abstract semantics through Galois connections/insertions, and the feasibility of a fixed point computation of the abstract semantics, through the fast convergence of ...
CORTESI, Agostino, ZANIOLI, Matteo
openaire   +3 more sources

Radial symmetry for a generalized nonlinear fractional p-Laplacian problem

open access: yesNonlinear Analysis, 2021
This paper first introduces a generalized fractional p-Laplacian operator (–Δ)sF;p. By using the direct method of moving planes, with the help of two lemmas, namely decay at infinity and narrow region principle involving the generalized fractional p ...
Wenwen Hou   +3 more
doaj   +1 more source

Design Conformity of Indonesian-Made Mini Rice Combine Harvester and Anthropometry of Javanese Farmers

open access: yesAgritech, 2020
The combine harvester in Yogyakarta Province Special Region has a small size because it is used to harvest rice in a narrow area. The purpose of this study is to determine which parts of the mini combine harvester machine are not ergonomic and need to be
Guntarti Tatik Mulyati   +3 more
doaj   +1 more source

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