Results 41 to 50 of about 15,675 (260)

Pointwise multipliers of weighted BMO spaces [PDF]

Proceedings of the American Mathematical Society, 1989
Let \(w:{\mathbb{R}}\to {\mathbb{R}}^+\) be a weight function satisfying the doubling condition: \(\int_{J}w(x)dx\leq C\int_{I}w(x)dx\), whenever I and J are intervals such that \(I\subset J\) and \(| J| \leq 2| I|\). The paper under review describes the weighted atomic \(H^ 1\)- space \(H_ w^ 1({\mathbb{R}})\) and weighted BMO-space \(BMO_ w({\mathbb ...
openaire   +2 more sources

Sharp decay estimates and smoothness for solutions to nonlocal semilinear equations

, 2015
We consider semilinear equations of the form p(D)u=F(u), with a locally bounded nonlinearity F(u), and a linear part p(D) given by a Fourier multiplier.
Cappiello, Marco, Nicola, Fabio
core   +1 more source

Some Estimates for the Jump of the Derivative of the Lagrange Multiplier Function in Optimal Control Problems with Second-order State Constraints

Известия Иркутского государственного университета: Серия "Математика"
The optimal control problem for a nonlinear dynamic system of a cascade type with endpoint and irregular pointwise state constraints (the so-called state constraints of depth 2) is studied.
D.Yu. Karamzin
doaj   +1 more source

An Introduction to Conformal Ricci Flow [PDF]

, 2003
We introduce a variation of the classical Ricci flow equation that modifies the unit volume constraint of that equation to a scalar curvature constraint.
Anderson M, Andersson L Moncrief V, Arthur E Fischer, Aubin T, Aubin T, Berger M, DeTurck D, DeTurck D, Ebin D, Ebin D, Fischer A, Fischer A, Fischer A, Fischer A, Fischer A, Fischer A, Fischer A, Fischer A, Fischer A, Fischer A, Fischer A, Fischer A Moncrief V, Fischer A Moncrief V M Flato R Kerner A Lichnerowicz, Hamilton R, Hamilton R, Hamilton R, Isenberg J, Lang S, Marsden J, Misner C W, Omori H, Palais R, Palais R, Palais R, Perelman G, Perelman G, Perelman G, Protter M, Schoen R, Taylor M, Thurston W, Wheeler J A, Wheeler J A, Ye R   +43 more
core   +1 more source

A Unifying Approach to Self‐Organizing Systems Interacting via Conservation Laws

Advanced Intelligent Discovery, EarlyView.
The article develops a unified way to model and analyze self‐organizing systems whose interactions are constrained by conservation laws. It represents physical/biological/engineered networks as graphs and builds projection operators (from incidence/cycle structure) that enforce those constraints and decompose network variables into constrained versus ...
F. Barrows, G. Zhang, S. Anand, Z. Chen, J. Lin, A. Desai, S. Martiniani, F. Caravelli   +7 more
wiley   +1 more source

Twisted convolution and Moyal star product of generalized functions

, 2012
We consider nuclear function spaces on which the Weyl-Heisenberg group acts continuously and study the basic properties of the twisted convolution product of the functions with the dual space elements.
B. S. Mityagin, D. H. T. Franco, E. Brüning, F. A. Berezin, G. Köthe, H. H. Schaefer, I. M. Gel’fand, J. M. Gracia-Bondia, J. M. Maillard, J. Neumann von, L. Hormander, L. Álvarez-Gaumé, M. A. Antonets, M. A. Antonets, M. A. Antonets, M. A. Soloviev, M. A. Soloviev, M. A. Soloviev, M. A. Soloviev, M. A. Soloviev, M. A. Soloviev, M. A. Soloviev, M. A. Soloviev, M. A. Soloviev, M. A. Soloviev, M. Chaichian, M. Morimoto, M. Morimoto, N. Seiberg, O. W. Greenberg, R. Estrada, R. J. Szabo, S. Doplicher, S. Doplicher, V. E. Hubeny, V. Gayral, V. I. Arnold, V. P. Palamodov, V. V. Zharinov   +38 more
core   +1 more source

Disentangling Aleatoric and Epistemic Uncertainty in Physics‐Informed Neural Networks: Application to Insulation Material Degradation Prognostics

Advanced Intelligent Systems, EarlyView.
Physics‐Informed Neural Networks (PINNs) provide a framework for integrating physical laws with data. However, their application to Prognostics and Health Management (PHM) remains constrained by the limited uncertainty quantification (UQ) capabilities.
Ibai Ramirez, Jokin Alcibar, Joel Pino, Mikel Sanz, Jose I. Aizpurua   +4 more
wiley   +1 more source

Seeds of change: The impact of Ethiopia's direct seed marketing approach on smallholders' seed purchases and productivity

American Journal of Agricultural Economics, EarlyView.
Abstract While multiple factors explain low adoption rates of improved varieties by small‐scale farmers in sub‐Saharan Africa, a key supply‐side constraint is the limited availability of seed embodying new traits in the volume, quality, price, and timeliness required by farmers. This constraint is partly attributable to classical failures in the market
Dawit Mekonnen, Gashaw T. Abate, Seid Yimam, Rui Benfica, David J. Spielman, Frank Place   +5 more
wiley   +1 more source

Regional Shopping Objectives in British Grocery Retail Transactions Using Segmented Topic Models

Applied Stochastic Models in Business and Industry, EarlyView.
ABSTRACT Understanding the customer behaviours behind transactional data has high commercial value in the grocery retail industry. Customers generate millions of transactions every day, choosing and buying products to satisfy specific shopping needs.
Mariflor Vega Carrasco, Mirco Musolesi, Jason O'Sullivan, Rosie Prior, Ioanna Manolopoulou   +4 more
wiley   +1 more source

On twisted Fourier analysis and convergence of Fourier series on discrete groups

, 2008
We study norm convergence and summability of Fourier series in the setting of reduced twisted group $C^*$-algebras of discrete groups. For amenable groups, F{\o}lner nets give the key to Fej\'er summation.
A. Connes, A. Connes, A. Figà-Talamanca, A. Kleppner, A. Kleppner, A. Paterson, A. Valette, A. Valette, A. Valette, A.L. Carey, A.Yu. Ol’shanskiĭ, B. Dorofaeff, C. Berg, C. Nebbia, C.A. Akemann, E. Bédos, E. Ghys, E.G. Effros, Erik Bédos, F. Luef, F. Luef, G. Fendler, G. Fendler, G. Mackey, G. Pisier, G. Zeller-Meier, I. Chatterji, J. Bellissard, J. Bellissard, J. Brodzki, J. Cannière de, J. Dixmier, J. Dixmier, J. Dixmier, J.-L. Sauvageot, J.-L. Sauvageot, J.A. Packer, J.A. Packer, J.A. Packer, J.A. Packer, J.A. Packer, J.E. Humphreys, J.M. Cohen, J.P. Pier, K. Gröchenig, K.R. Davidson, L.B. Schweitzer, M. Bożejko, M. Bożejko, M. Bożejko, M. Bożejko, M. Bożejko, M. Cowling, M. Cowling, M. Cowling, M. Gromov, M. Leinert, M. Marcolli, M.A. Picardello, N. Higson, N. Ozawa, N. Weaver, N.B. Backhouse, N.B. Backhouse, P. Eymard, P. Jolissaint, P. Jolissaint, P. Jolissaint, P. la Harpe de, P. la Harpe de, P. la Harpe de, P.-A. Cherix, R. Exel, R. Ji, R. Mercer, R.B. Howlett, Roberto Conti, S. Wagon, T. Januszkiewicz, U. Haagerup, U. Haagerup, V. Flory, V. Mathai, V. Paulsen, X. Chen   +84 more
core   +2 more sources