Positive Definiteness of Gravitational Field Energy
Positive Definiteness of Gravitational Field Energy is a scholarly work, published in 1968 in ''Physical Review Letters''. The main subjects of the publication include gravitational field, classical mechanics, physics, performance indicator, space, quantum electrodynamics, positive definiteness, Variation (astronomy), gravitational energy, vacuum state, definiteness, sea level rise, energy, theory of relativity, field, and gravity. At the extremum the energy vanishes and space is flat; second variation shows that the vacuum state is also a local minimum.