2 citations · 2 across the 2 of their papers we have counts for
4 papers
Topology of event horizon in axially symmetric spacetime: Classification of Maxwell set with symmetry
Masaru Siino
The crease set of an event horizon is studied in a spacetime with discrete or continuous symmetry. It determines possible topologies on spatial sections of an event horizon. We the…
Topological Structure of The Upper End of Future Null Infinity
S. Tomizawa, M. Siino
We propose a method to determine the topological structure of an event horizon far in the future of a spacetime from the geometrical information of its future null infinity. In the…
Causal Feature of Central Singularity and Gravitational Mass
Tatsuhiko Koike, Hisashi Onozawa, Masaru Siino
Mass of singularity is defined, and its relation to whether the singularity is spacelike, timelike or null is discussed for spherically symmetric spacetimes. It is shown that if th…
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…