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Kinematic Self-Similar Solutions of Locally Rotationally Symmetric Spacetimes
Locally rotationally symmetric Self-similarity
2010/6/30
This paper contains locally rotationally symmetric kinematic self-similar perfect fluid and dust solutions. We consider three families of metrics which admit kinematic self-similar vectors of the firs...
Projective Geometry and $\cal PT$-Symmetric Dirac Hamiltonian
Projective Geometry $\cal PT$-Symmetric Dirac Hamiltonian
2010/4/13
The $(3 + 1)$-dimensional (generalized) Dirac equation is shown to have the same form as the equation expressing the condition that a given point lies on a given line in 3-dimensional projective space...