Why is Gravity Hard to Unify with Other Forces?
Robert J. Heaston
Keywords: Gravity, Force, Unification
Five possible reasons why gravity has been difficult to unify with other forces are: disagreement over what unification means; differences in the strengths of the forces; failure to identify common elements among the forces; assumption of geometrized units; and, an emphasis on working with energy levels rather than force magnitudes. The rationale behind this categorization of reasons is discussed.
Use of set theory to analyze why the gravitational force is so hard to unify with other forces.
