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gr-qc2003
Parameterization of the Equation of State and the expansion history of the very recent universe
W. F. Kao
Motivated by a nice result shown by E. Linder, a detailed discussion on the choice of the expansion parameters of the Maclaurin series for the equation of states of a perfect fluid…
gr-qc2003
A note on 4-dimensional traversable wormholes and energy conditions in higher dimensions
W. F. Kao, Chopin Soo
We show explicitly that traversable wormholes requiring exotic matter in 4-dimensions nevertheless have acceptable stress-tensors obeying reasonable energy conditions in higher dim…