Search results for "Geometria diferencial"

showing 2 items of 2 documents

Radial conformal motions in Minkowski space–time

1999

A study of radial conformal Killing fields (RCKF) in Minkowski space-time is carried out, which leads to their classification into three disjointed classes. Their integral curves are straight or hyperbolic lines admitting orthogonal surfaces of constant curvature, whose sign is related to the causal character of the field. Otherwise, the kinematic properties of the timelike RCKF are given and their applications in kinematic cosmology is discussed.

PhysicsField (physics)Geometria diferencialConformal field theoryFísica matemàticaMinkowski's theoremMathematical analysisStatistical and Nonlinear PhysicsMinkowski diagramConformal mapConstant curvatureGeneral Relativity and Quantum CosmologyClassical mechanicsMinkowski spaceMathematical PhysicsSign (mathematics)Journal of Mathematical Physics
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Two-Perfect Fluid Interpretation of an Energy Tensor

1990

The paper contains the necessary and sufficient conditions for a given energy tensor to be interpreted as a sum of two perfect fluids. Given a tensor of this class, the decomposition in two perfect fluids (which is determined up to a couple of real functions) is obtained.

Weyl tensorPhysicsTensor contractionFluidsPhysics and Astronomy (miscellaneous)Geometria diferencialMathematical analysisTensor fieldPhysics::Fluid Dynamicssymbols.namesakeExact solutions in general relativityRelativitat general (Física)symbolsSymmetric tensorStress–energy tensorTensorTensor density
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