Results 31 to 40 of about 23,363,338 (328)

An Alzheimer’s disease category progression sub-grouping analysis using manifold learning on ADNI

open access: yesScientific Reports, 2023
Many current statistical and machine learning methods have been used to explore Alzheimer’s disease (AD) and its associated patterns that contribute to the disease.
Dustin van der Haar   +4 more
doaj   +1 more source

Asymptotically conical Calabi-Yau manifolds, III [PDF]

open access: yes, 2012
This is the first part in a two-part series on complete Calabi-Yau manifolds asymptotic to Riemannian cones at infinity. We begin by proving general existence and uniqueness results.
Ronan J. Conlon, H. Hein
semanticscholar   +1 more source

Dubrovin's duality for F-manifolds with eventual identities [PDF]

open access: yes, 2011
A vector field <i>E</i> on an <i>F</i>-manifold (M, o, e) is an eventual identity if it is invertible and the multiplication X*Y := X o Y o E^{-1} defines a new F-manifold structure on <i>M</i>.
Ian A.B. Strachan   +3 more
core   +1 more source

Practical Stability with Respect to h-Manifolds for Impulsive Control Functional Differential Equations with Variable Impulsive Perturbations

open access: yesMathematics, 2019
The present paper is devoted to the problems of practical stability with respect to h-manifolds for impulsive control differential equations with variable impulsive perturbations.
Gani Stamov   +3 more
doaj   +1 more source

Bucshbaum simplicial posets [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2014
The family of Buchsbaum simplicial posets generalizes the family of simplicial cell manifolds. The $h'-$vector of a simplicial complex or simplicial poset encodes the combinatorial and topological data of its face numbers and the reduced Betti numbers of
Jonathan Browder, Steven Klee
doaj   +1 more source

Contact Semi-Riemannian Structures in CR Geometry: Some Aspects

open access: yesAxioms, 2019
There is one-to-one correspondence between contact semi-Riemannian structures ( η , ξ , φ , g ) and non-degenerate almost CR structures ( H , ϑ , J ) .
Domenico Perrone
doaj   +1 more source

Quasi-Kahler Chern-flat manifolds and complex 2-step nilpotent Lie algebras [PDF]

open access: yes, 2012
The study of quasi-Kaehler Chern-flat almost Hermitian manifolds is strictly related to the study of anti-bi-invariant almost complex Lie algebras.
Lauret, J.   +2 more
core   +1 more source

Topological field theories induced by twisted R-Poisson structure in any dimension

open access: yesJournal of High Energy Physics, 2021
We construct a class of topological field theories with Wess-Zumino term in spacetime dimensions ≥ 2 whose target space has a geometrical structure that suitably generalizes Poisson or twisted Poisson manifolds.
Athanasios Chatzistavrakidis
doaj   +1 more source

Finiteness of classifying spaces of relative diffeomorphism groups of 3–manifolds [PDF]

open access: yes, 1997
The main theorem shows that if M is an irreducible compact connected ori- entable 3{manifold with non-empty boundary, then the classifying space BDi (M rel @M) of the space of dieomorphisms of M which restrict to the identity map on @M has the homotopy ...
A. Hatcher, Darryl McCullough
semanticscholar   +1 more source

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