Using the Uncharged Kerr Black Hole as a Gravitational Mirror
Using Time Drift of Cosmological Redshifts to find the Mass-Energy Density of the Universe
Usual and phantom scalar fields in five dimensions: compactification and flat thick brane solutions
Utilization of electromagnetic detector for selection and detection of high-frequency relic gravitational waves
UV and IR quantum-spacetime effects for the Chandrasekhar model
UV/IR Mixing and Black Hole Thermodynamics