Results 51 to 60 of about 304 (131)
Papers in Palaeontology, Volume 10, Issue 1, January/February 2024.Abstract An unusually rich and diverse suite of virgianid brachiopods, hitherto poorly known, is systematically described here for the first time from the Ordovician–Silurian boundary interval (late Katian – Aeronian) of North Greenland. The Late Ordovician virgianids comprise typical taxa of the warm‐water Tcherskidium fauna (e.g.
Jisuo Jin +3 more
wiley +1 more source
, 2023 We prove the sharp domain of dependence property for solutions to subelliptic wave equations for sums of squares of vector fields satisfying H\"ormander bracket condition.
Burq, Nicolas, Zuily, Claude
core
The ergodic problem for some subelliptic operators with unbounded coefficients [PDF]
, 2016 article 47International audienceWe study existence and uniqueness of the invariant measure for a stochastic process with degenerate diffusion, whose infinitesimal generator is a linear subelliptic operator in the whole space R N with coefficients that ...
Tchou, Nicoletta +2 more
core +1 more source
Anisotropic estimates of subelliptic type
, 2019 We discuss some estimates of subelliptic type related with vector fields satisfying the Hormander condition. Our approach makes use of a class of approximate exponentials studied in our previous papers. Such kind of estimates arises naturally ...
Morbidelli, Daniele +3 more
core +1 more source
Drift diffusion equations with fractional diffusion on compact Lie groups
, 2022 In this work we investigate the well-posed for diffusion equations associated to subelliptic pseudo-differential operators on compact Lie groups.
Cardona Sanchez, Duvan +2 more
core +1 more source
A Multiplicity Result for a Non-Homogeneous Subelliptic Problem with Sobolev Exponent
, 2020 We prove a multiplicity result for the inhomogeneous subelliptic problem (formula presented) is a sub-Laplacian on a Carnot group (formula presented) is the critical Sobolev exponent in this context, Ω is a bounded domain of G and f is small in a ...
Loiudice A., Annunziata Loiudice
core +1 more source
Harnack estimates for degenerate parabolic equations modeled on the subelliptic p -Laplacian
Advances in Mathematics, 2014 We establish a Harnack inequality for a class of quasi-linear PDE modeled on the prototype {equation*} \partial_tu= -\sum_{i=1}^{m}X_i^\ast (|\X u|^{p-2} X_i u){equation*} where $p\ge 2$, $ \ \X = (X_1,..., X_m)$ is a system of Lipschitz vector fields defined on a smooth manifold $\M$ endowed with a Borel measure $μ$, and $X_i^*$ denotes the adjoint of
Capogna, Luca +4 more
openaire +7 more sources
We prove the sharp domain of dependence property for solutions to subelliptic wave equations for sums of squares of vector fields satisfying Hörmander bracket condition.
Nicolas Burq, Claude Zuily
core +1 more source
, 2023 The purpose of this paper is twofold: first we study an eigenvalue problem for the fractional $p$-sub-Laplacian over the fractional Folland-Stein-Sobolev spaces on stratified Lie groups. We apply variational methods to investigate the eigenvalue problems.
Kumar, Vishvesh +5 more
core +1 more source