Classical unified field theories to isospin rather than electromagnetism; this is related to a discrete (or ""internal"") symmetry known to Einstein as "displacement field duality". Einstein became increasingly isolated in his research on a generalized theory of gravitation, and most physicists consider his attempts ultimately unsuccessful. In particular, his pursuit of a unification of the fundamental forces ignored developments in quantum physics (and vice versa), most notably the discovery of the strong nuclear force and weak nuclear force. Inspired by Einstein's approach to a unified field theory and Eddington's idea of the affine connection as the sole basis for differential geometric structure for space-time,
Unified neutral theory of biodiversity not straight, but the slope changes from being steep at small areas, shallower at intermediate areas, and steep at the largest areas. The formula for species composition may be used to calculate the expected number of species present in a community under the assumptions of the Unified Theory. In symbols where θ is the fundamental biodiversity number. This formula specifies the expected number of species sampled in a community of size "J". The last term, formula_63, is the expected number of "new" species encountered when adding one new individual to the community. This is an increasing function of θ and