Results 21 to 30 of about 72,164 (263)
Generic Riemannian Maps from Nearly Kaehler Manifolds
Computer Sciences & Mathematics Forum, 2023 In order to generalise semi-invariant Riemannian maps, Sahin first introduced the idea of “Generic Riemannian maps”. We extend the idea of generic Riemannian maps to the case in which the total manifold is a nearly Kaehler manifold.
Richa Agarwal, Shahid Ali
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Extraction of Blood Vessels Geometric Shape Features with Catheter Localization and Geodesic Distance Transform for Right Coronary Artery Detection. [PDF]
Journal of Engineering Research - Egypt, 2023 X-ray angiography is considered the standard imaging sensory system for diagnosing coronary artery diseases. For automated, accurate diagnosis of such diseases, coronary vessels’ detection from the captured low quality and noisy angiography images is ...
Ahmed Hawas +3 more
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Twistor space origins of the Newman-Penrose map
SciPost Physics, 2022 Recently, we introduced the "Newman-Penrose map", a novel correspondence between a certain class of solutions of Einstein's equations and self-dual solutions of the vacuum Maxwell equations, which we showed was closely related to the classical double ...
Kara Farnsworth, Michael L. Graesser, Gabriel Herczeg
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On geodesic mappings of symmetric pairs
Proceedings of the International Geometry Center, 2023 The paper treats properties of pseudo-Riemannian spaces admitting non-trivial geodesic mappings. A symmetric pair of pseudo-Riemannian spaces is a pair of spaces with coinciding values of covariant derivatives for their Riemann tensors. It is proved that the symmetric pair of pseudo-Riemannian spaces, which are not spaces of constant curvatures, are ...
Olexandr Latysh +2 more
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On geodesic exponential maps of the Virasoro group [PDF]
Annals of Global Analysis and Geometry, 2006 We study the geodesic exponential maps corresponding to Sobolev type right-invariant (weak) Riemannian metrics μ(k) (k≥ 0) on the Virasoro group Vir and show that for k≥ 2, but not for k = 0,1, each of them defines a smooth Frechet chart of the unital element e ∈Vir.
Boris Kolev +4 more
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A Novel Approach to Canonical Divergences within Information Geometry
Entropy, 2015 A divergence function on a manifold M defines a Riemannian metric g and dually coupled affine connections ∇ and ∇ * on M.
Nihat Ay, Shun-ichi Amari
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Modular conjugations in 2D conformal field theory and holographic bit threads
Journal of High Energy Physics, 2022 We study the geometric action of some modular conjugations in two dimensional (2D) conformal field theories. We investigate the bipartition given by an interval when the system is in the ground state, either on the line or on the circle, and in the ...
Mihail Mintchev, Erik Tonni
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Creation of a complex electronic map of agriculture and agro-geo databases using GIS techniques [PDF]
E3S Web of Conferences, 2021 This article is devoted to the creation of complex electronic maps of agriculture and agro-geo databases on the basis of geoformation systems (GIS) and technologies. Scientific and practical research on the mapping of the agricultural sector conducted by
Oymatov Rustam, Safayev Sanjarbek
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On geodesic mappings in a particular class of Roter spaces [PDF]
Colloquium Mathematicum, 2021 We determine a particular class of Roter type warped product manifolds. We show that every manifold of that class admits a geodesic mapping onto a some Roter type warped product manifold. Moreover, both geodesically related manifolds are pseudosymmetric of constant type.
Ryszard Deszcz, Marian Hotloś
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On some differential-geometric aspects of the Torelli map [PDF]
, 2018 In this note we survey recent results on the extrinsic geometry of the Jacobian locus inside $\mathsf{A}_g$. We describe the second fundamental form of the Torelli map as a multiplication map, recall the relation between totally geodesic subvarieties and
A Mohajer +24 more
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