**After 100 Years of General Relativity Theory its Time for Super Principle Relativity Theory**

**Abstract**

In this Part #3, the “Super Principle Relativity Theory” uses various “Hydrodynamic Field ─ Vacuum Energy Density ─ Frames of Reference”, which are differentiated by the symbol (*ψ*); to distinguish between: gravitational, electromagnetic, isotropic space-time world line, gravitational sink, gravitational source, electromagnetic sink, and electromagnetic source frames of reference. The “Hydrodynamic Field ─ Frame of Reference” is described mathematically by the **Euler-Lagrangian “Hydrodynamic Field Vacuum Energy Density” Gravitation** equation. Also, the “Hydrodynamic Field ─ Frame of Reference” is described mathematically by the **Einstein – General Relativity Theory “Hydrodynamic Field Vacuum Energy Density” Gravitation** equation.

**Keywords:** General Relativity, Ricci Curvature, Einstein Field Equation, Euler-Lagrangian Field Theory, Classical Field Theory, Einstein Field Theory, Gravitational Field, Vacuum Energy Density, Hydrodynamic, Gravitation, Black Hole