Results 1 to 10 of about 1,008,318 (283)

Classification of general absolute geometries with Lambert-Saccheri quadrangles

open access: yesLe Matematiche, 2006
Without claiming any kind of continuity we show that an absolute geometry has either a singular, a hyperbolic or an elliptic congruence,
Helmut Karzel, Mario Marchi
doaj  

Hyperbolic Graph Wavelet Neural Network

open access: yesTsinghua Science and Technology
Graph neural networks (GNNs), grounded in spatial or spectral domains, have achieved remarkable success in learning graph representations in Euclidean space.
Wenjie Zheng   +5 more
doaj   +1 more source

Hyperbolic embedding of brain networks as a tool for epileptic seizures forecasting

open access: yesPhysical Review Research
The evidence indicates that intracranial electroencephalographic connectivity, as estimated from daily resting state recordings from epileptic patients, may be capable of identifying preictal states.
Martin Guillemaud   +3 more
doaj   +1 more source

Compact Spacelike Hypersurfaces with Constant Mean Curvature in the Antide Sitter Space

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2009
We obtain a height estimate concerning to a compact spacelike hypersurface Σn immersed with constant mean curvature H in the anti-de Sitter space ℍ1n+1, when its boundary ∂Σ is contained into an umbilical spacelike hypersurface of this spacetime which ...
Henrique F. de Lima   +1 more
doaj   +1 more source

Hyperbolic Casimir-like wormhole

open access: yesEuropean Physical Journal C: Particles and Fields
We present a systematic study of exact solutions for traversable wormhole geometries in a static and hyperbolic symmetric spacetime. In the conventional form of studying wormhole geometry, traversability requires the presence of exotic matter, which also
R. Avalos   +3 more
doaj   +1 more source

Mathematical model for highly sensitive photonic crystal fiber sensor based on hyperbolic black holes

open access: yesScientific Reports
In this paper, the photonic crystal fiber sensor based on the geometry of hyperbolic black holes is proposed. As the hyperbolic black hole concentrates the electromagnetic radiation in its powerful gravitational field, the designed sensor has resulted in
Seyede Mahboobeh Mousavi Monazah   +2 more
doaj   +1 more source

Almost hyperbolic Ricci solitons on almost co-Ka¨hler manifolds

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы
This research investigates almost hyperbolic Ricci solitons on almost co-K¨ahler manifolds, an important class of odd-dimensional manifolds closely related to Ka¨hler geometry.
S. Azami, U.C. De
doaj   +1 more source

Hyperbolic geometry of the olfactory space. [PDF]

open access: yesSci Adv, 2018
Zhou Y, Smith BH, Sharpee TO.
europepmc   +1 more source

A two parameter family of lightcone-like hyperbolic string vertices

open access: yesJournal of High Energy Physics
We introduce a two parameter family of string field theory vertices, which we refer to as hyperbolic Kaku vertices. It is defined in terms of hyperbolic metrics on the Riemann surface, but the geometry is allowed to depend on inputs of the states.
Vinícius Bernardes, Ulisses Portugal
doaj   +1 more source

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