arXiv subjects

M. Montesinos-Velasquez

Publications and source records attributed to M. Montesinos-Velasquez.

2 recordsLinked to original sources

arXiv1996

From vacuum field equations on principal bundles to Einstein equations with fluids

In the present work we show that the Einstein equations on $M$ without cosmological constant and with perfect fluid as source, can be obtained from the field equations for vacuum with cosmological constant on the principal fibre bundle $P(\frac{1}{I} M,U(1))$, $M$ being the space-time and $I$ the radius of the internal space $U(1)$.

gr-qc↗

arXiv1996

Isometries and embedding of the thermodynamic phase space of an ideal gas

In this work we find the Killing vector fields of the riemannian submanifolds of the thermodynamic phase space of an ideal gas and show that the isometry group corresponding to them is homomorphic to the euclidean group $E(2)$. We also give the embedding of these submanifolds in the euclidean space $(R^{3},\ delta)$.

gr-qc↗