Results 51 to 60 of about 2,346 (181)
Alkene Hydrogenation by a Cationic, Nine‐Coordinate Molybdenum(VI) Pentahydride Catalyst
Chemistry – A European Journal, Volume 32, Issue 31, 18 August 2026.While late 3d metals dominate efforts to replace precious metals in homogeneous hydrogenation, molybdenum has remained largely ignored. This work reveals that a nine‐coordinate pentahydrido molybdenum complex can hydrogenate a broad range of alkenes efficiently, demonstrating that early‐metal polyhydrides can serve as genuine catalysts rather than mere
Arno Estival +9 more
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A proof of Hörmander’s theorem for sublaplacians on Carnot groups [PDF]
Nonlinear Analysis, 2015 Let \(G\) be a Carnot group and let \(\mathcal{L}\) be its left-invariant sub-Laplacian. As a consequence of Hörmander's theorem, \(\mathcal{L}\) is hypoelliptic, that is, for every distribution \(u\) on \(G\), if \(\mathcal{L}u \in C^\infty\), then \(u \in C^\infty\).
Bramanti, Marco, Brandolini, Luca
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Yamabe-Type Equations on Carnot Groups
Potential Analysis, 2016 This article is concerned with a class of elliptic equations on Carnot groups depending of one real positive parameter and involving a critical nonlinearity. As a special case of our results we prove the existence of at least one nontrivial solution for a subelliptic critical equation defined on a smooth and bounded domain $D$ of the {Heisenberg group}
Molica Bisci G, Repovs D
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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
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Rankine Carnot Batteries with the Integration of Thermal Energy Sources: A Review
Energies, 2020 This paper provides an overview of a novel electric energy storage technology. The Thermally Integrated Pumped Thermal Electricity Storage (TI-PTES) stores electric energy as thermal exergy.
Guido Francesco Frate +2 more
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The Theorem of Busemann-Feller-Alexandrov in Carnot Groups [PDF]
Communications in Analysis and Geometry, 2004 The authors prove a version of the Busemann-Feller-Alexandrov theorem for the class of weakly \(H\)-convex functions in Carnot groups. Precisely, let \(\mathbf G\) be a Carnot group of step \(r=2\) with a system \(X_1,\dots,X_m\) of bracket generating left-invariant vector fields.
DANIELLI D. +3 more
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CSF fibrinogen predicts longitudinal Tau accumulation in cognitively unimpaired older adults
Alzheimer's &Dementia, Volume 22, Issue 8, August 2026.Abstract INTRODUCTION Blood–brain barrier (BBB) dysfunction is an early feature of Alzheimer's disease (AD). Fibrinogen represents a sensitive marker of BBB leakage, but whether it modifies longitudinal tau progression in cognitively unimpaired (CU) individuals remains unknown.
Christos Panagiotis Lisgaras +21 more
wiley +1 more source
MULTIFRACTAL ANALYSIS OF FUNCTIONS ON HEISENBERG AND CARNOT GROUPS [PDF]
Journal of the Institute of Mathematics of Jussieu, 2015 In this article, we investigate the pointwise behaviors of functions on the Heisenberg group. We find wavelet characterizations for the global and local Hölder exponents. Then we prove some a priori upper bounds for the multifractal spectrum of all functions in a given Hölder, Sobolev, or Besov space. These upper bounds turn out to be optimal, since in
Seuret, S., Vigneron, F.
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The Isoperimetric Problem in Carnot-Caratéodory Spaces
Bruno Pini Mathematical Analysis Seminar, 2017 We present some recent results obtained on the isoperimetric problem in a class of Carnot-Carathéodory spaces, related to the Heisenberg group. This is the framework of Pansu’s conjecture about the shape of isoperimetric sets.
Valentina Franceschi
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Alzheimer's &Dementia, Volume 22, Issue 8, August 2026.Abstract INTRODUCTION An extra copy of the amyloid precursor protein (APP) gene causes autosomal dominant Alzheimer's disease (AD) and AD in Down syndrome (DS), but the factors underlying variability in age at onset (AAO) remain unclear. We investigated whether sporadic AD risk variants modify AAO. METHODS We analyzed clinical and genetic data from 100
Joan Groeneveld +39 more
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