Results 71 to 80 of about 2,194,014 (300)

A commutator estimate for pseudo-differential operators [PDF]

Proceedings of the American Mathematical Society, 1988
For the commutator B ⋅ A
openaire   +2 more sources

Lie Bialgebroid of Pseudo-differential Operators

Journal of Nonlinear Mathematical Physics, 2022
AbstractWe associate a Lie bialgebroid structure to the algebra of formal Pseudo-differential operators, as the classical limit of a quantum groupoid. As a consequence, the non-commutative Kadomtsev–Petviashvili hierarchy is naturally obtained by an algebraic procedure.
openaire   +1 more source

Impact of the Process Atmosphere During Hot Isostatic Pressing on the Near‐Surface Composition of an Additively Manufactured Austenitic High‐Interstitial Steel

Advanced Engineering Materials, EarlyView.
A high interstital austenitic steel is additively manufactured and postdensified by HIP to eliminate gas porosity. Thereby, the loss of N and Mn in Ar HIP atmosphere is investigated. Further, HIP using N2 atmosphere is investigated which led to excessive nitride formation.
F. Großwendt, J. Hahn, J. Kimm, S. Weber, J. Lentz   +4 more
wiley   +1 more source

L2-Lp estimates and Hilbert–Schmidt pseudo differential operators on the Heisenberg motion group

, 2023
In this paper, we study some operator theoretical properties of pseudo-differential operators with operator-valued symbols on the Heisenberg motion group. Specifically, we investigate L-2-L-p boundedness of pseudo-differential operators on the Heisenberg
Mondal, Shyam Swarup, Kumar, Vishvesh
core   +1 more source

Intertwinors on Functions over the Product of Spheres

Symmetry, Integrability and Geometry: Methods and Applications, 2011
We give explicit formulas for the intertwinors on the scalar functions over the product of spheres with the natural pseudo-Riemannian product metric using the spectrum generating technique.
Doojin Hong
doaj   +1 more source

Achieving High ON State Current through Ferroelectric Polarization‐Dependent Interfacial Resistance Switching in Undoped Orthorhombic HfO2 Films

Advanced Functional Materials, EarlyView.
Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand, Nuno Estrócio, Ji S. Kim, Babak Bakhit, Marian C. Istrate, Corneliu Ghica, Tiago Rebelo, Nives Strkalj, Abin Varghese, Bernardo Almeida, Luís S. Marques, Bipin Rajendran, Judith L. MacManus‐Driscoll, José P. B. Silva   +13 more
wiley   +1 more source

Analytic formulas for topological degree of non-smooth mappings: the even-dimensional case

, 2013
Topological degrees of continuous mappings between oriented manifolds of even dimension are studied in terms of index theory of pseudo-differential operators.
Goffeng, Magnus,, Goffeng, Magnus, Goffeng, Magnus C H T, Goffeng, Magnus C H T,   +3 more
core   +1 more source

Novel Theorems on Spacetime Admitting Pseudo-W2 Curvature Tensor

Journal of Mathematics
This paper investigates spacetime manifolds admitting a pseudo-W2 curvature tensor. We show that a pseudo-W2 flat spacetime is an Einstein manifold and therefore has constant curvature.
B. B. Chaturvedi, Prabhawati Bhagat, Mohammad Nazrul Islam Khan   +2 more
doaj   +1 more source

On the transformation of FOTF system to fractional order LTI model [PDF]

Archives of Control Sciences
This article addresses modeling systems using fractional order derivatives, highlighting three basic approaches: differential equations, operator methods, and state space representations.
Jacek Jagodziński, Marta Lampasiak
doaj   +1 more source

Strong Lead‐Free Bioinspired Piezoceramics for Durable Energy Transducers

Advanced Functional Materials, EarlyView.
We fabricated brick‐and‐mortar lead‐free piezoceramics with Bi0.5Na0.5TiO3 monocrystal platelets as bricks and amorphous silica as mortar. The alignment of the bricks and the presence of the amorphous silica led to anisotropic residual stresses. These residual stresses increase the samples toughness, strength and durability while the brick alignment ...
Ruxue Yang, Temesgen Tadeyos Zate, Peiren Wang, Soumyajit Mojumder, Elo Overgaard Mogensen, Oriol Gavalda‐Diaz, Zihe Li, Shitong Zhou, Ajeet Kumar, James Roscow, Hamideh Khanbareh, Astri Bjørnetun Haugen, Florian Bouville   +12 more
wiley   +1 more source