Results 11 to 20 of about 8,242,359 (127)

A complex network perspective on brain disease. [PDF]

open access: yesBiol Rev Camb Philos Soc
ABSTRACT If brain anatomy and dynamics have a complex network structure as it has become standard to posit, it is reasonable to assume that such a structure should play a key role not only in brain function but also in brain dysfunction. However, exactly how network structure is implicated in brain damage and whether at least some pathologies can be ...
Papo D, Buldú JM.
europepmc   +2 more sources

Cohomology of D-complex manifolds [PDF]

open access: yes, 2012
In order to look for a well-behaved counterpart to Dolbeault cohomology in D-complex geometry, we study the de Rham cohomology of an almost D-complex manifold and its subgroups made up of the classes admitting invariant, respectively anti-invariant ...
Daniele Angella   +4 more
core   +1 more source

Chern-flat and Ricci-flat invariant almost Hermitian structure [PDF]

open access: yes, 2010
We study nilmanifolds endowed with a Chern ...
Antonio J. Di Scala   +3 more
core   +1 more source

Embedding almost-complex manifolds in almost-complex euclidean spaces [PDF]

open access: yes, 2011
We show that any compact almost-complex manifold (M, J) of complex dimension m can be pseudo-holomorphically embedded in R6m equipped with a suitable almost-complex structure
Antonio J. Di Scala   +6 more
core   +1 more source

Almost Riemann Solitons with Vertical Potential on Conformal Cosymplectic Contact Complex Riemannian Manifolds [PDF]

open access: yes, 2022
Almost-Riemann solitons are introduced and studied on an almost contact complex Riemannian manifold, i.e., an almost-contact B-metric manifold, which is obtained from a cosymplectic manifold of the considered type by means of a contact conformal ...
Manev, Mancho, Mancho Manev
core   +1 more source

A new curvature-like tensor in an almost contact Riemannian manifold

open access: yes, 2016
In a M. Prvanović’s paper [5], we can find a new curvature-like tensor in an almost Hermitian manifold.In this paper, we define a new curvature-like tensor, named contact holomorphic Riemannian, briefly (CHR), curvature tensor in an almost ...
Koji Matsumoto
core   +2 more sources

Structure connection in an almost contact metric manifold [PDF]

open access: yes, 1980
In 1970, semisymetric connection were studied by Yano [1] in a Riemannian manifold and in 1972 Mishra [2] studied affine connection in an almost contact Riemannian manifold.
Sinha, B. B., Yadava, S. L.
core   +2 more sources

Cohomologies of certain orbifolds [PDF]

open access: yes, 2013
We study the Bott–Chern cohomology of complex orbifolds obtained as a quotient of a compact complex manifold by a finite group of ...
Angella, Daniele
core   +1 more source

SDFs from Unoriented Point Clouds using Neural Variational Heat Distances

open access: yesComputer Graphics Forum, EarlyView.
We propose a novel variational approach for computing neural Signed Distance Fields (SDF) from unoriented point clouds. We first compute a small time step of heat flow (middle) and then use its gradient directions to solve for a neural SDF (right). Abstract We propose a novel variational approach for computing neural Signed Distance Fields (SDF) from ...
Samuel Weidemaier   +5 more
wiley   +1 more source

A new class of almost complex structures on tangent bundle of a Riemannian manifold [PDF]

open access: yes, 2018
summary:In this paper, the standard almost complex structure on the tangent bunle of a Riemannian manifold will be generalized. We will generalize the standard one to the new ones such that the induced $(0,2)$-tensor on the tangent bundle using these ...
Baghban, Amir, Abedi, Esmaeil
core   +1 more source

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