ABSTRACT
According to equation (4.59), the interval δs between two events recorded at (x, y, z, t) and (x + δx, y + δy, z + δz, t + δt) in the inertial reference frame ∑, and defined by the relation () δ s 2 = δ x 2 + δ y 2 + δ z 2 − c 2 δ t 2 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203983805/89768c00-4d8a-484e-b69a-f8a52bfbf6b8/content/eq916.tif"/>
