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23 659 (0,148s)

Result

Classification of Solvable Lie Algebras with a Given Nilradical by Means of Solvable Extensions of its Subalgebras

algebra n_n-2,1 as a subalgebra but not as an ideal. Rather surprisingly it turns out thatthe classification of such solvable algebras can be deduced from the classification of solvable algebras with the ...

BA - Obecná matematika

  • 2010
  • Jx
Result

About the classification of the holonomy algebras of lorentzian manifolds

The classification of the holonomy algebras of Lorentzian manifolds can be reduced to the classification of the irreducible subalgebras h in so(n of irreducible holonomy algebras of Riemannian manifolds. The natura...

BA - Obecná matematika

  • 2013
  • Jx
  • Link
Result

Deformations of current Lie algebras. I. Small algebras in characteristic 2

We compute low-degree cohomology of current Lie algebras extended over the 3-dimensional simple algebra, compute deformations of related semisimple Lie algebras, and apply these results to classification of simple ...

Pure mathematics

  • 2017
  • Jimp
  • Link
Result

Algebraic classification of the Weyl tensor : selected applications

Selected applications of the algebraic classi?cation of tensors on Lorentzian manifolds of arbitrary dimension are discussed. We clarify some aspects of the relationship between invariants of tensors and their algebraic class, discu...

BA - Obecná matematika

  • 2012
  • D
Result

Holonomy of Einstein Lorentzian manifolds

The classification of all possible holonomy algebras of Einstein and vacuum Einstein Lorentzian manifolds is obtained. It is shown that each such algebra appears as the holonomy algebra of an Einstein (resp. vacuum...

BA - Obecná matematika

  • 2010
  • Jx
Result

Lorentzian holonomy algebras and their applications

We discuss the classification of the holonomy algebras of Lorentzian manifolds and their applications...

BA - Obecná matematika

  • 2011
  • O
Result

Classification of the Weyl tensor in higher dimensions

We discuss the algebraic classification of the Weyl tensor in higher-dimensional Lorentzian manifolds. This is done by characterizing algebraically special Weyl tensors by means of the existence of aligned null vectors of v...

BA - Obecná matematika

  • 2004
  • Jx
Result

Some applications of the Lorentzian holonomy algebras

It is shown how one can apply the classification of the holonomy algebras of Lorentzian manifolds to solve some problems. In particular, a new proof to the classification of Lorentzian manifolds with recurrent curvature ten...

BA - Obecná matematika

  • 2012
  • Jx
Result

Curvature tensors on distorted Killing horizons and their algebraic classification

We consider generic static spacetimes with Killing horizons and study properties of curvature tensors in the horizon limit. It is determined that the Weyl, Ricci, Riemann and Einstein tensors are algebraically special and mutually aligned on...

BA - Obecná matematika

  • 2005
  • Jx
Result

On a general construction of diagonal algebras

There is found the construction of generalized diagonal algebras of type I, and an idea of their classification.

BA - Obecná matematika

  • 2000
  • Jx
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