Classical unified field theories since antisymmetry seemed essential for electromagnetism, the symmetry requirement was relaxed for one or both fields. Einstein's proposed unified-field equations (fundamental laws of physics) were generally derived from a variational principle expressed in terms of the Riemann curvature tensor for the presumed space-time manifold. In field theories of this kind, particles appear as limited regions in space-time in which the field strength or the energy density are particularly high. Einstein and coworker Leopold Infeld managed to demonstrate that, in Einstein's final theory of the unified field, true singularities of the field did have trajectories resembling point particles. However, singularities are
Unified Patents Unified Patents Unified Patents is a member-based organization whose goal is reducing the number of non-practicing entity (NPE) assertions in specific technology areas. Instances of NPE patent litigation have grown recently: NPEs (commonly referred to as patent trolls) accounted for the majority of patent infringement litigation in the U.S. in 2012, compared to less than a quarter in 2007. This is because NPEs can achieve a quick return on investment since most companies settle rather than fight, even if they believe the assertion to be invalid. Unified permits small and large companies alike to become members. Smaller members act as