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A time derivative is a derivative of a function with respect to time, usually interpreted as the rate of change of the value of the function.<ref>Chiang, Alpha C., Fundamental Methods of Mathematical Economics, McGraw-Hill, third edition, 1984, ch. 14, 15, 18.</ref> The variable denoting time is usually written as <math>t\,</math>.


Time derivative sections
Intro  Notation  Use in physics  Use in economics  See also  References  

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