Linked from

The 15 pages that link to Spacetime interval, each with the reason it gives.

• Special relativityRelated: It is the frame-independent measure underlying relativistic geometry.

• Lorentz transformationRelated: Its invariance is the defining constraint on the transformation.

• SpacetimeRelated: It measures separation in a way that all inertial observers agree on.

• Light coneRelated: Its sign determines whether two events are timelike, spacelike, or lightlike separated.

• Proper timeRelated: Proper time is obtained from the spacetime interval along a timelike path.

• Relativity of simultaneityRelated: Its invariance constrains how frames can disagree about event times.

• Time dilationRelated: Its geometry explains why observers assign different time intervals to separated events.

• Event (relativity)Related: Unlike coordinate separations, the interval is unchanged between inertial frames.

• WorldlineRelated: Its sign distinguishes timelike, spacelike, and lightlike separations along spacetime paths.

• Four-vectorRelated: Four-vector norms use the same invariant spacetime geometry.

• Twin paradoxRelated: Its geometry underlies the path-dependent proper time compared in the paradox.

• Lorentz covarianceRelated: Its invariance motivates the transformations that covariant equations must accommodate.

• Spacetime diagramRelated: Its sign classifies separations as timelike, lightlike, or spacelike.

• Poincaré groupRelated: Poincaré transformations preserve this quantity for every pair of events.

• Ladder paradoxRelated: It remains unchanged even as observers disagree about event separations in space and time.