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 Theory (band) they relocated to Los Angeles and began recording their debut album. The album was recorded at Stank Face Laboratories and Lucky Dog Studios in Seattle, and was produced by both Thorn and Smith, and mixed by Andy Wallace. Jon Bolton and Matthew Steer contributed additional drums to the recording, while string arrangements were handled by Dave Dysart. In June, Unified Theory shot a music video for their first single "California" with director Bobby G, before touring the US in July. The band's debut album entitled "Unified Theory" was released on August 15, 2000, through 3.33 Music Group in North America