Results 71 to 80 of about 14,219 (239)
MetalMat, EarlyView.Hydrometallurgical flowsheet to extract lithium from spodumene by combining leaching with maleic acid and solvent extraction with Cyanex 936P. ABSTRACT This paper explores a novel approach to lithium recovery from spodumene, a lithium‐bearing mineral. Instead of traditional sulfuric acid leaching, organic acids—specifically maleic acid—are investigated
Sara El Hakim +3 more
wiley +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
W2,p a priori estimates for nonvariational operators: the sharp maximal function technique
Bruno Pini Mathematical Analysis Seminar, 2018 We consider a nonvariational degenerate elliptic operator, structured on a system of left invariant, 1-homogeneous, Hörmander vector fields on a Carnot group, where the coefficient matrix is symmetric, uniformly positive on a bounded domain and the ...
Marco Bramanti
doaj +1 more source
, 2022 Jet spaces on $\mathbb R^n$ have been shown to have a canonical structure of stratified Lie groups (also known as Carnot groups). We construct jet spaces over stratified Lie groups adapted to horizontal differentiation and show that these jet spaces are themselves stratified Lie groups.
Golo, Sebastiano Nicolussi +1 more
openaire +2 more sources
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
Angewandte Chemie, Volume 137, Issue 36, September 1, 2025.We report the role of the fatty acyl chains in biological activities of phosphatidic acids (PA). Several PA probes having two different fatty acyl chains were synthesized through a multi‐steps synthesis and bearing various fluorophores or photo‐cross‐linkers (PCL).
Antoine Schlichter +29 more
wiley +2 more sources
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
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
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
Conformality and Q-harmonicity in Carnot groups
Duke Mathematical Journal, 2006 We show that if f is a 1-quasiconformal map defined on an open subset of a Carnot group G, then composition with f preserves Q-harmonic functions. We combine this with a regularity theorem for Q-harmonic functions and an algebraic regularity theorem for maps between Carnot groups to show that f is smooth.
Capogna, Luca, Cowling, Michael
openaire +4 more sources