| − | The 4-space is the other name of our spacetime (fourth component of 4-space being the time making out of 3-dimensional ordinary (x, y, z) space a 4-dimensional continuum t, x, y, z). So the '''curvature of 4-space''' it the same thing as [[curvature of spacetime]]. | + | The 4-space is the other name of our spacetime (fourth component of 4-space being the time making out of 3-dimensional ordinary (x, y, z) space a 4-dimensional continuum t, x, y, z). So the '''curvature of 4-space''' is the same thing as [[curvature of spacetime]]. |