Special Relativity In General | Frames: From Part...

: Energy, momentum, and the Principle of Least Action .

: Unlike traditional textbooks, it adopts a 4D Minkowski spacetime view immediately, defining worldlines, 4-velocity, and 4-acceleration as absolute geometric objects independent of any coordinate system. Special Relativity in General Frames: From Part...

: By using a modern mathematical framework (tensors, exterior calculus, and differential forms), it serves as a rigorous foundation for students moving toward general relativity. : Energy, momentum, and the Principle of Least Action