Results 31 to 40 of about 1,147 (194)

Riemannian geometry of optimal driving and thermodynamic length and its application to chemical reaction networks

open access: yesPhysical Review Research, 2022
It is known that the trajectory of an endoreversibly driven system with minimal dissipation is a geodesic on the equilibrium state space. Thereby, the state space is equipped with the Riemannian metric given by the Hessian of the free energy function ...
Dimitri Loutchko   +2 more
doaj   +1 more source

Vanishing theorems for compact hessian manifolds [PDF]

open access: yesAnnales de l'Institut Fourier, 1986
A manifold is said to be Hessian if it admits a flat affine connection D and a Riemannian metric g such that
openaire   +2 more sources

Robust Hessian Locally Linear Embedding Techniques for High-Dimensional Data

open access: yesAlgorithms, 2016
Recently manifold learning has received extensive interest in the community of pattern recognition. Despite their appealing properties, most manifold learning algorithms are not robust in practical applications.
Xianglei Xing, Sidan Du, Kejun Wang
doaj   +1 more source

A non-convex optimization framework for large-scale low-rank matrix factorization

open access: yesMachine Learning with Applications, 2022
Low-rank matrix factorization problems such as non negative matrix factorization (NMF) can be categorized as a clustering or dimension reduction technique. The latter denotes techniques designed to find representations of some high dimensional dataset in
Sajad Fathi Hafshejani   +3 more
doaj   +1 more source

A Lichnerowicz–Obata–Cheng Type Theorem on Finsler Manifolds

open access: yesMathematics, 2018
Let ( M , F , d μ ) be a Finsler manifold with the Ricci curvature bounded below by a positive number and constant S-curvature. We prove that, if the first eigenvalue of the Finsler⁻Laplacian attains its lower bound, then M is ...
Songting Yin, Pan Zhang
doaj   +1 more source

Passivity and Immersion (P&I) Approach With Gaussian Process for Stabilization and Control of Nonlinear Systems

open access: yesIEEE Access, 2022
The virtual derivatives computation and successive derivations of virtual inputs in an adaptive backstepping controller cause the explosion of complexity. Moreover, the feedback linearization has poor robustness features and necessitates exact estimation
Syed Shadab Nayyer   +5 more
doaj   +1 more source

The Dirichlet problem for the k-Hessian equation on a complex manifold

open access: yesAmerican Journal of Mathematics, 2022
We solve the Dirichlet problem for $k$-Hessian equations on compact complex manifolds with boundary, given the existence of a subsolution. Our method is based on a second order a priori estimate of the solution on the boundary with a particular gradient scale.
Collins, Tristan C., Picard, Sebastien
openaire   +3 more sources

The Soliton-Ricci Flow with variable volume forms

open access: yesComplex Manifolds, 2016
We introduce a flow of Riemannian metrics and positive volume forms over compact oriented manifolds whose formal limit is a shrinking Ricci soliton. The case of a fixed volume form has been considered in our previouswork.We still call this new flow, the ...
Pali Nefton
doaj   +1 more source

Health decline in prison and the effects of sporting activity: results of the Hessian prison sports study

open access: yesHealth & Justice, 2023
Background Previous studies about health in prisons conclude that incarceration has detrimental consequences for physical and mental health. It is associated with weight gain, decreased fitness, increased cardiovascular risks, and increased risks for ...
Michael Mutz, Johannes Müller
doaj   +1 more source

A Note on Pseudo-Umbilical Submanifolds of Hessian Manifolds with Constant Hessian Sectional Curvature [PDF]

open access: yesISRN Geometry, 2011
The geometry of Hessian manifold, as a branch of statistics, physics, Kaehlerian, and affine differential geometry, is deeply fruitful and a new field for scientists. However, inspite of its importance submanifolds and curvature conditions of it have not been so well known yet.
Yilmaz, Münevver Yildirim   +1 more
openaire   +2 more sources

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