Results 111 to 120 of about 521,595 (154)

Deformation of Surfaces in Lie Sphere Geometry [PDF]

open access: yes, 2006
The theory of surfaces in Euclidean space can be naturally formulated in the more general context of Legendre surfaces into the space of contact elements. We address the question of deformability of Legendre surfaces with respect to the symmetry group of
Musso, Emilio, Nicolodi, L., NICOLODI L.
core  

(η6-Benzene)chlorido[2-(pyridin-2-yl)quinoline-κ2N,N′]ruthenium(II) tetrafluoridoborate

open access: yesIUCrData
The title compound, [RuCl(C6H6)(C14H10N2)]BF4 or [Ru(η6-benzene)(L)Cl]+BF4− [where L denotes the 2-(pyridin-2-yl)quinoline ligand], crystallizes in the monoclinic space group P21/c.
Manikandan Varadhan   +3 more
doaj   +1 more source

A Goodness-of-Fit Test for Uniformity on Distance-Regular Graphs with Applications to Grouped Directional Data

open access: yesAxioms
One of the main tasks in the field of directional statistics is to build goodness-of-fit tests for uniformity on circles, spheres or more abstract manifolds. We discuss a goodness-of-fit test for uniformity on a distance-regular graph.
Jean-Renaud Pycke
doaj   +1 more source

Non-null slant ruled surfaces and tangent bundle of pseudo-sphere

open access: yesAIMS Mathematics
<p>A slant ruled surface is a unique type of ruled surface composed by Frenet vectors that form a constant angle with each other and with specific directions in space. In this paper, the non-null slant ruled surface, which is generated by the striction curve of the natural lift curve, was constructed with a novel approximation in $ E^{3}_{1 ...
openaire   +2 more sources

Spacelike parallels and evolutes in Minkowski pseudo-spheres

open access: yesSpacelike parallels and evolutes in Minkowski pseudo-spheres
We consider extrinsic differential geometry on spacelike hypersurfaces in Minkowski pseudo-spheres (hyperbolic space, de Sitter space and the lightcone). In the previous paper [S. Izumiya, Legendrian dualities and spacelike hypersurfaces in the lightcone, Preprint] we have shown a basic Legendrian duality theorem between pseudo-spheres.
openaire  

Gender, Diversity and the European Public Sphere [PDF]

open access: yes
This paper is an exercise in asking new questions from old theories. New questions that lead to new theoretical considerations, and to new ideas for how to design studies and analyze data. The American psychologist Abraham Maslow reputedly said ‘When all
Helene Pristed Nielsen
core  

On Using Cutting Planes in Pseudo-Boolean Optimization [PDF]

open access: yes, 2006
Cutting planes are a well-known, widely used, and very eective technique for Integer Linear Programming (ILP). However, cutting plane techniques are seldom used in Pseudo-Boolean Optimization (PBO) algorithms.
Marques-Silva, J. P.   +3 more
core  

The Ricci Curvature of Totally Real 3-dimensional Submanifolds of the Nearly Kaehler 6-Sphere [PDF]

open access: yes, 2007
Let M be a compact 3-dimensional totally real submanifold of the nearly Kaehler 6-sphere. If the Ricci curvature of M satisfies Ric(M) ,thenM is a totally geodesic submanifold ( and Ric(M)# 2)
Li Haizhong, Kaehler -sphere
core  

On analytic maps of the pseudosphere

open access: yesMonatshefte f�r Mathematik, 1964
HELFENSTEIN, H.G., Castonguay, C.E.
openaire   +1 more source

Pseudo Market Timing and Predictive Regressions [PDF]

open access: yes
A number of studies claim that aggregate managerial decision variables, such as aggregate equity issuance, have power to predict stock or bond market returns.
Ryan Taliaferro   +2 more
core  

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