Results 141 to 150 of about 201 (184)

On |R, log n, 1|-summability factors of power series on ist circle of convergence.

Srivastava, V.P., Das, G., Mohapatra, R.N.   +2 more
core  

A Versatile‐Designable Framework for Active and Programmable Shape‐Morphing Soft Matter Systems: From Inverse Design to Closed‐Loop Control

Advanced Science, EarlyView.
A versatile framework integrates addressable electrothermal actuation and strain‐constraint mechanisms to construct programmable shape‐morphing soft matter systems. By combining an analytical inverse design strategy for high‐fidelity 3D surface reconstruction with deep learning‐based closed‐loop control, this approach enables zero‐energy shape locking,
Kai Liu, Peiling Xie, Ruitong Song, Banghan Liu, Rui Guo, Jiu‐an Lv   +5 more
wiley   +1 more source

Halide Perovskite: A Rich Source of Thermal Insulator

Advanced Science, EarlyView.
Halide perovskites exhibit ultralow thermal conductivity driven by intrinsic lattice softness and strong anharmonicity, falling below conventional defect‐engineering limits. Weak metavalent bonding, A‐site rattling, and dynamic octahedral tilting drive phonon scattering to the Ioffe–Regel limit, where wave‐like tunneling replaces particle‐like ...
Haolin Ye, Bangzhi Ge, Yuan Yu, Chongjian Zhou   +3 more
wiley   +1 more source

Nanoscale Optical Inhomogeneities From Compositional Segregation Within Individual GaN‐on‐Si Quantum Wells

Advanced Science, EarlyView.
This work visualizes local variations in luminescence and relates them to nanoscale chemical inhomogeneities in single InxGa1−xN quantum wells. We demonstrate that the elemental segregation is only inherent to quantum wells with high indium content. Density functional theory shows this to be the result of strain‐induced phase stabilization, explaining ...
Jing‐Yang Chung, Tara P. Mishra, Zackaria Mahfoud, Thomas E. Gage, Jianguo Wen, Katherine P. Rice, Isabelle Martin, Li Zhang, Govindo J. Syaranamual, Stephen J. Pennycook, Silvija Gradečak, Pieremanuele Canepa, Michel Bosman   +12 more
wiley   +1 more source

Volatile ZrO2 Antiferroelectric Tunnel Junctions for Rapid, Energy‐Efficient Physical Reservoir Computing

Advanced Science, EarlyView.
An antiferroelectric tunnel junction serves as a reservoir computing node, where field‐induced phase transitions and spontaneous ZrO2 relaxation deliver nonlinear fading memory. An In‐Ga‐Zn oxide interlayer enlarges the memory margin and multibit state richness.
Taegyu Kwon, Moonseek Jeong, Su In Hwang, Geun Hyeong Park, Joonyong Kim, Hyojun Choi, Hyeong Seok Choi, Da Hyun Kim, Dong Hee Han, Ju Yong Park, Seungho Baek, Jung Ho Yoon, Dong Hyun Lee, Min Hyuk Park   +13 more
wiley   +1 more source

Review: C. N. Moore, Summable Series and Convergence Factors

, 1939
openaire   +1 more source

Convergence and Summability Factors in a Sequence (II)

Mathematika, 1983
L S Bosanquet
exaly   +3 more sources

On convergence and summability factors in a sequence

Mathematika, 1954
It is familiar that if Ean is convergent and en is positive and decreasing then Eansn is convergent (Abel's test). More generally du Bois-Reymond and Dedekind (sufficiency) and Hadamard (necessity) showed that a necessary and sufficient condition for Eanen to converge whenever Ean converges is that en be of bounded variation.
L. S. Bosanquet
openaire   +2 more sources

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On the factorable spaces of absolutelyp-summable, null, convergent, and bounded sequences

Mathematica Slovaca, 2021
AbstractLetFdenote the factorable matrix andX∈ {ℓp,c0,c,ℓ∞}. In this study, we introduce the domainsX(F) of the factorable matrix in the spacesX. Also, we give the bases and determine the alpha-, beta- and gamma-duals of the spacesX(F). We obtain the necessary and sufficient conditions on an infinite matrix belonging to the classes (ℓp(F),ℓ∞), (ℓp(F),f)
Başar, Feyzi, Roopaei, Hadi
openaire   +1 more source

An Estimate of the Rate of Convergence for the Absolute Summability of Factors of Infinite Series

Power System Technology, 2023
Here in, we provide evidence of three theorems about a special case of the absolute summing-up-factors of infinite series using much less stringent conditions. Some particular results on various absolute summability approaches also been produced. The papers [7], [21], and [22] serve inspirations for our work.
openaire   +1 more source