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gr-qc2005★ 20 cited
Accelerating Universe via Spatial Averaging
Yasusada Nambu, Masayuki Tanimoto
We present a model of an inhomogeneous universe that leads to accelerated expansion after taking spatial averaging. The model universe is the Tolman-Bondi solution of the Einstein…
gr-qc1993
Local Structure of Numerically Generated Worm Hole Spacetime
Yasusada Nambu, Masaru Siino
We investigate the evolution of the apparent horizons in a numerically gererated worm hole spacetime. The behavior of the apparent horizons is affected by the dynamics of the matte…