Results 61 to 70 of about 12,503,673 (230)
Dearomative Nucleophilic Addition of Lithium Enolates to Electron‐Poor Indoles
ChemPhysChem, EarlyView.Electrophilic electron‐depleted indoles undergo 1,4‐addition to afford the dearomatized products, with complete diastereoselectivity, after smooth hydrolysis. While 3‐nitroindoles readily furnish the corresponding nitroindolines, α‐ketoamide indoles show a more complex reactivity, undergoing either 1,2‐ or 1,4‐addition, depending on the steric ...
Mélanie Roseau +4 more
wiley +1 more source
Cordes nonlinear operators in Carnot groups
Electronic Journal of Differential Equations, 2015 Our aim is to obtain L^p estimates for the second-order horizontal derivatives of the solutions for a nondivergence form nonlinear equation in Carnot groups.
Giuseppe Di Fazio +1 more
doaj
Ball‐Milling Assisted Iron‐Catalyzed Difluoromethylation Toward the Synthesis of Valuable Oxindoles
ChemSusChem, EarlyView.An iron‐catalyzed difluoroalkylation of acrylamides under ball‐milling conditions affords oxindoles in up to 85% yield. Analytical studies reveal that the apparent piezoelectric activity originates from iron leaching caused by milling assembly abrasion during the reaction process. The iron‐catalyzed process proves to be efficient with a broad substrate
Vitalii Solomin +4 more
wiley +1 more source
Dispersion‐Less Dissipative Soliton Fiber Laser
Laser &Photonics Reviews, EarlyView.A dispersion‐less fiber laser architecture generates high‐energy, pedestal‐free picosecond pulses without resorting to conventional pulse stretching. This energy‐managed laser achieves remarkable flexibility in pulse parameters, delivering up to 0.54 μJ$\mathrm{\mu}\mathrm{J}$ pulses with minimal spectral distortion using standard telecom components ...
Mostafa I. Mohamed +2 more
wiley +1 more source
A density result on a BV-type space on Carnot groups
Bruno Pini Mathematical Analysis SeminarIn the setting of Carnot groups (connected, simply connected and stratified Lie groups), we prove a density result for a BV-type space previously introduced in [3].
Annalisa Baldi +1 more
doaj +1 more source
Uniqueness and comparison principles for semilinear equations and inequalities in Carnot groups
Advances in Nonlinear Analysis, 2018 Variants of the Kato inequality are proved for distributional solutions of semilinear equations and inequalities on Carnot groups. Various applications to uniqueness, comparison of solutions and Liouville theorems are presented.
D’Ambrosio Lorenzo, Mitidieri Enzo
doaj +1 more source
Rigidity of fiber-preserving quasisymmetric maps
, 2015 We show that fiber-preserving quasisymmetric maps are biLipschitz. As an application, we show that quasisymmetric maps on Carnot groups with reducible first stratum are ...
Donne, Enrico Le, Xie, Xiangdong
core +1 more source
Can tropical cyclones exist near the Equator?
Quarterly Journal of the Royal Meteorological Society, EarlyView.Schematic showing how a developed TC responds to reduced Coriolis parameter (f). Zero‐f lowers inertial stability and increases agradient force, enhancing radial inflow at lower levels. Stronger inflow deepens the inflow layer and promotes convergence, intensifying convection and downdrafts in outer rainbands.
Min Li, Ralf Toumi
wiley +1 more source
Analysis and Geometry in Metric Spaces, 2013 In this paper we study heat kernels associated with a Carnot group G, endowed with a family of collapsing left-invariant Riemannian metrics σε which converge in the Gromov- Hausdorff sense to a sub-Riemannian structure on G as ε→ 0.
Capogna Luca +2 more
doaj +1 more source
Metric currents, differentiable structures, and Carnot groups [PDF]
, 2011 We examine the theory of metric currents of Ambrosio and Kirchheim in the setting of spaces admitting differentiable structures in the sense of Cheeger and Keith.
Williams, Marshall
core +1 more source