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## Main Question or Discussion Point

I’ve been told that “differential aging” and “time dilation” are two different things. I had thought that one was the integral of the other. Can anyone give a PRECISE (mathematical!) definition of each, what the distinctions are between them? Thanks.

(How the heck am I supposed to know what thread level to assign to my questions??)

(How the heck am I supposed to know what thread level to assign to my questions??)