نتایج جستجو برای: (mean) cartan tensor

تعداد نتایج: 629918  

Journal: :iranian journal of science and technology (sciences) 2005
b. najafi

in this paper the general relatively isotropic l -curvature finsler metrics are studied. it isshown that on constant relatively landsberg spaces, the concepts of weakly landsbergian, landsbergianand generalized landsbergian metrics are equivalent. some necessary conditions for a relativelyisotropic l -curvature finsler metric to be a riemannian metric are also found.

2015
Yi-Nan Wang

We develop the generalized Cartan Calculus for the groups G = SL(2,R) × R +, SL(5,R) and SO(5, 5). They are the underlying algebraic structures of d = 9, 7, 6 exceptional field theory, respectively. These algebraic identities are needed for the “tensor hierarchy” structure in exceptional field theory. The validity of Poincaré lemmas in this new differential geometry is also discussed. Finally w...

2008
Nejat T. Yılmaz

We have applied the method of dualisation to construct the coset realisation of the bosonic sector of the N = 2, D = 6 supergravity which is coupled to a tensor multiplet. The bosonic field equations are regained through the Cartan-Maurer equation which the Cartan form satisfies. The first-order formulation of the theory is also obtained as a twisted self-duality condition within the non-linear...

2016
JAN CAMERON ERIK CHRISTENSEN ALLAN M. SINCLAIR ROGER R. SMITH

We show that a number of key structural properties transfer between sufficiently close II1 factors, including solidity, strong solidity, uniqueness of Cartan masas and property Γ. We also examine II1 factors close to tensor product factors, showing that such factors also factorise as a tensor product in a fashion close to the original.

2009
Luca Fabbri

We consider the ESK theory, based on the principle for which the space is filled with matter fields in such a way that Cartan torsion is spin; in the geometry in which Cartan torsion tensor is completely antisymmetric then spin has to be completely antisymmetric as well: we will show how spin complete antisymmetry constraints the form of possible matter field theories as to allow the special ca...

2006
Luca Fabbri

Theory of General Relativity is considered from the point of view of its general structure; it has been showed that if one assumes any connection to be a metric connection then Cartan tensor must necessary be completely antisymmetric, and an example of application is considered in the case of Lie group theory. Under a geometrical point of view, Cartan tensor is thought to represent the Torsion ...

2008
Luca Fabbri

We discuss the general structure of metric geometries, and how metricity implies the complete antisymmetry of Cartan tensor; an application in the frame of Lie group theory is given. Interpretations of the completely antisymmetric torsion in physical models are reviewed.

Journal: :Results in Mathematics 2021

Abstract We continue our study of the mixed Einstein–Hilbert action as a functional pseudo-Riemannian metric and linear connection. Its geometrical part is total scalar curvature on smooth manifold endowed with distribution or foliation. develop variational formulas for quantities extrinsic geometry metric-affine space use them to derive Euler–Lagrange equations (which in case space-time are an...

1995
VADIM SCHECHTMAN

In Chapter 1 we associate with every Cartan matrix of finite type and a non-zero complex number ζ an abelian artinian category FS. We call its objects finite factorizable sheaves. They are certain infinite collections of perverse sheaves on configuration spaces, subject to a compatibility (”factorization”) and finiteness conditions. In Chapter 2 the tensor structure on FS is defined using funct...

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