''Homogeneous'' Gravitational Field in General Relativity ?
'AdS_5' Geometry Beyond Space-time and 4D Noncommutative Space-time
'Antigravity' Propulsion and Relativistic Hyperdrive
'Square Root' of the Maxwell Lagrangian versus confinement in general relativity
't Hooft's Polygon Approach Hyperbolically Revisited
'Universal' FitzGerald Contractions