Think about 3 events, where Elizabeth 1and Elizabeth 2are usually timelike, and At the 1and At the 3are usually lightlike: For simpleness, state the coordinates are usually arranged such that Δcon = 0, and Δz = 0, therefore that (Δbeds) 2= (Δt) 2+ (Δa) 2. Whát if we apply the normal Pythagoras theorem therefore that (Δs i9000) 2= (Δcapital t) 2+ (Δtimes) 2+ (Δy) 2+ (Δz) 2and use the following evaluation. Sometimes, it appears to become referred to as the customized Pythagoras théorem. However, it appears to me it can be this method by definition and does not have got to end up being so. Whenever, I come across the spacetime period of time, created like this, say, (Δt) 2= (Δcapital t) 2- (Δtimes) 2- (Δy) 2- (Δz) 2, it is usually as if it has to be that method.
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