Results 41 to 50 of about 1,300,131 (168)

de Sitter State in Heterotic String Theory

Fortschritte der Physik, Volume 72, Issue 11, November 2024.
Abstract Recent no‐go theorems have ruled out four‐dimensional classical de Sitter vacua in heterotic string theory. On the other hand, the absence of a well‐defined Wilsonian effective action and other related phenomena also appear to rule out such time‐dependent vacua with de Sitter isometries, even in the presence of quantum corrections.
Stephon Alexander, Keshav Dasgupta, Archana Maji, Pichai Ramadevi, Radu Tatar   +4 more
wiley   +1 more source

The Zahorski theorem is valid in Gevrey classes [PDF]

Fundamenta Mathematicae, 1996
The well-known Zahorski theorem [\textit{Z. Zahorski}, Fundam. Math. 34, 183-245 (1947; Zbl 0033.25504)] asserts that for every partition \(\{\Omega,F,G\}\) of \([0,1]\subset\mathbb{R}\), where \(\Omega\) is an open subset of \([0,1]\), \(F\) is a (Baire) first category \(F_\sigma\)-subset of \([0,1]\) and \(G\) is a \(G_\delta\)-subset of \([0,1 ...
Schmets, Jean, Valdivia, Manuel
openaire   +2 more sources

Predicting spatiotemporal patterns of productivity and grazing from multispectral data using neural network analysis based on system complexity

Agrosystems, Geosciences &Environment, Volume 7, Issue 3, September 2024.
Abstract Remote sensing tools, along with Global Navigation Satellite System cattle collars and digital soil maps, may help elucidate spatiotemporal relationships among soils, terrain, forages, and animals. However, standard computational procedures preclude systems‐level evaluations across this continuum due to data inoperability and processing ...
A. J. Ashworth, A. Avila, H. Smith, T. E. Winzeler, P. Owens, C. Flynn, P. O'Brien, D. Philipp, J. Su   +8 more
wiley   +1 more source

Extension Gevrey et rigidité dans un secteur [PDF]

, 1995
We study a rigidity property, at the vertex of some plane sector, for Gevrey classes of holomorphic functions in the sector.
Thilliez, Vincent
core  

On the global $C^\infty$ and Gevrey hypoellipticity on the torus of some classes of degenerate elliptic operators

, 2011
In this paper we prove the global $C^\infty$ and Gevrey hypoellipticity on the multidimensional torus for some classes of degenerate elliptic ...
ALBANESE, Angela Anna, Albanese, Angela A.   +1 more
core   +1 more source

Taming the terminological tempest in invasion science

Biological Reviews, Volume 99, Issue 4, Page 1357-1390, August 2024.
ABSTRACT Standardised terminology in science is important for clarity of interpretation and communication. In invasion science – a dynamic and rapidly evolving discipline – the proliferation of technical terminology has lacked a standardised framework for its development.
Ismael Soto, Paride Balzani, Laís Carneiro, Ross N. Cuthbert, Rafael Macêdo, Ali Serhan Tarkan, Danish A. Ahmed, Alok Bang, Karolina Bacela‐Spychalska, Sarah A. Bailey, Thomas Baudry, Liliana Ballesteros‐Mejia, Alejandro Bortolus, Elizabeta Briski, J. Robert Britton, Miloš Buřič, Morelia Camacho‐Cervantes, Carlos Cano‐Barbacil, Denis Copilaș‐Ciocianu, Neil E. Coughlan, Pierre Courtois, Zoltán Csabai, Tatenda Dalu, Vanessa De Santis, James W. E. Dickey, Romina D. Dimarco, Jannike Falk‐Andersson, Romina D. Fernandez, Margarita Florencio, Ana Clara S. Franco, Emili García‐Berthou, Daniela Giannetto, Milka M. Glavendekic, Michał Grabowski, Gustavo Heringer, Ileana Herrera, Wei Huang, Katie L. Kamelamela, Natalia I. Kirichenko, Antonín Kouba, Melina Kourantidou, Irmak Kurtul, Gabriel Laufer, Boris Lipták, Chunlong Liu, Eugenia López‐López, Vanessa Lozano, Stefano Mammola, Agnese Marchini, Valentyna Meshkova, Marco Milardi, Dmitrii L. Musolin, Martin A. Nuñez, Francisco J. Oficialdegui, Jiří Patoka, Zarah Pattison, Daniel Pincheira‐Donoso, Marina Piria, Anna F. Probert, Jes Jessen Rasmussen, David Renault, Filipe Ribeiro, Gil Rilov, Tamara B. Robinson, Axel E. Sanchez, Evangelina Schwindt, Josie South, Peter Stoett, Hugo Verreycken, Lorenzo Vilizzi, Yong‐Jian Wang, Yuya Watari, Priscilla M. Wehi, András Weiperth, Peter Wiberg‐Larsen, Sercan Yapıcı, Baran Yoğurtçuoğlu, Rafael D. Zenni, Bella S. Galil, Jaimie T. A. Dick, James C. Russell, Anthony Ricciardi, Daniel Simberloff, Corey J. A. Bradshaw, Phillip J. Haubrock   +84 more
wiley   +1 more source

The Metivier inequality and ultradifferentiable hypoellipticity

Mathematische Nachrichten, Volume 297, Issue 7, Page 2517-2531, July 2024.
Abstract In 1980, Métivier characterized the analytic (and Gevrey) hypoellipticity of L2$L^2$‐solvable partial linear differential operators by a priori estimates. In this note, we extend this characterization to ultradifferentiable hypoellipticity with respect to Denjoy–Carleman classes given by suitable weight sequences. We also discuss the case when
Paulo D. Cordaro, Stefan Fürdös
wiley   +1 more source

Cauchy problem for hyperbolic systems in Gevrey class. A note on Gevrey indices [PDF]

Annales de la Faculté des sciences de Toulouse : Mathématiques, 2000
The author considers the hyperbolic system \[ \begin{gathered} [I_4 D_t+ A(t) D_x+ B(t)]u(t,x)= 0,\\ u(0,x)= u_0(x)\end{gathered} \] in \(\Omega= [0,T]\times \mathbb{R}^1_x\) where \(I_4\) denotes the unit matrix of order 4 and \[ A(t)= \begin{pmatrix} \lambda(t) & 1 & 0 & 0\\ 0 &\lambda(t) & a(t) & 0\\ 0 & 0 & \mu(t) & 1\\ 0 & 0 & 0 & \mu(t)\end ...
openaire   +2 more sources

Propagation des singularités Gevrey pour l'équation de Cauchy-Riemann dégénérée

, 2001
International audienceIn this paper we study the degenerate Cauchy-Riemann equation in Gevrey classes. We first prove the local solvability in Gevrey classes of functions and ultra-distributions.
Lerner, Nicolas, Lascar, Bernard
core   +1 more source

Taylor dispersion and phase mixing in the non‐cutoff Boltzmann equation on the whole space

Proceedings of the London Mathematical Society, Volume 129, Issue 1, July 2024.
Abstract In this paper we describe the long‐time behavior of the non‐cutoff Boltzmann equation with soft potentials near a global Maxwellian background on the whole space in the weakly collisional limit (that is, infinite Knudsen number 1/ν→∞$1/\nu \rightarrow \infty$). Specifically, we prove that for initial data sufficiently small (independent of the
Jacob Bedrossian, Michele Coti Zelati, Michele Dolce   +2 more
wiley   +1 more source