Results 21 to 30 of about 25,799 (301)

Menelaus's theorem for hyperbolic quadrilaterals in the Einstein relativistic velocity model of hyperbolic geometry [PDF]

open access: yes, 2010
Hyperbolic Geometry appeared in the first half of the 19th century as an attempt to understand Euclid's axiomatic basis of Geometry.
Barbu, Catalin
core   +1 more source

Boxing Partula

open access: yesSubstantia, 2022
The comprehension of form generally assumes a euclidean three-dimensional perspective. I argue here that non-euclidean geometry has much to offer in understand­ing structures of atomic crystals, molecular liquid crystals and related mesoporous inorganic
Stephen Hyde
doaj   +1 more source

Interpretations of Euclidean Geometry [PDF]

open access: yesTransactions of the American Mathematical Society, 1990
Following Tarski, we view n n -dimensional Euclidean geometry as a first-order theory
openaire   +1 more source

On Angular Measures in Axiomatic Euclidean Planar Geometry

open access: yesMeasurement Science Review, 2022
We address the issue of angular measure, which is a contested issue for the International System of Units (SI). We provide a mathematically rigorous and axiomatic presentation of angular measure that leads to the traditional way of measuring a plane ...
Grötschel Martin   +3 more
doaj   +1 more source

Minimal Immersions of Kahler manifolds into Euclidean Spaces [PDF]

open access: yes, 2003
It is proved here that a minimal isometric immersion of a Kähler-Einstein or homogeneous Kähler-manifold into an Euclidean space must be totally ...
Di Scala, Antonio Jose'
core   +1 more source

NeutroGeometry & AntiGeometry are alternatives and generalizations of the Non-Euclidean Geometries [PDF]

open access: yesNeutrosophic Sets and Systems, 2021
In this paper we extend the NeutroAlgebra & AntiAlgebra to the geometric spaces, by founding the NeutroGeometry & AntiGeometry.
Florentin Smarandache
doaj   +1 more source

On the Geometry of No-Boundary Instantons in Loop Quantum Cosmology

open access: yesUniverse, 2019
We study the geometry of Euclidean instantons in loop quantum cosmology (LQC) such as those relevant for the no-boundary proposal. Confining ourselves to the simplest case of a cosmological constant in minisuperspace cosmologies, we analyze solutions of ...
Suddhasattwa Brahma, Dong-han Yeom
doaj   +1 more source

Linear Isometries on Pseudo-Euclidean Space [PDF]

open access: yes, 2012
In this paper, we characterize curvature of s-line, particularly, Smarandachely embedded graphs and determine linear isometries on (Rn, μ)
Mao, Linfan, Linfan Mao
core   +1 more source

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