Definition: | - for n positive quantities , positive nth root of their product:
- for a quantity x depending on a variable t, quantity calculated from the values of the given quantity by the expression:
where is a reference value
NOTE 1 The geometric mean value of a periodic quantity is usually taken over an integration interval the range of which is the period multiplied by a natural number. NOTE 2 The geometric mean value of a quantity is denoted by adding the subscript g to the symbol of the quantity.
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