Spacetime Physics Research Trends

arbitrary Castagnino causal set causal structure compatible with causal complete Heyting algebras consider constraint corresponding cosmological constant covariant cover scheme curve defined definition derive dimensional dsē dynamical Edited Einstein equation electric electromagnetic field energy conservation energy density energy flow energy momentum tensor entropy equation of motion evolution existence expectation values follows frame G₁ geometrical given global and non-entropic gravitational field gravitational waves Grothendieck topology Heyting algebra hypersurface irreversibility Kripke model laws light semicone linear mathematical Maxwell equations means metric multipole moments multipole particle Newtonian non-spacelike objects obtain operator Phys physical manifold post-Newtonian potential pretopology problem quantum cosmology quantum field theory quantum mechanics relation relativistic satisfy scalar screw dislocation sieve solution space spacetime special relativity subset surface of simultaneity symmetry temporal field theorem time-reversal invariant time-symmetric timelike transformation universe variables vector field Volume μν