In a recent thread about differential aging in the archetypal twin scenario, I suggested that the periods of oscillators are affected by accelerations, or in other words that a clock's tick rate is affected by changes in its speed. This statement was disagreed with by some, who said that it was contradicted by the clock hypothesis or postulate. However, the clock postulate just says that the rate of the earthbound clock is always related to the rate of the travelling clock by (1-v2)-1/2 . From the above mentioned thread, when asked for an equation relating tick rate and acceleration, I replied: To which DaleSpam replied: Note that v is speed. Are we in agreement then? Has it been straightened out?