These allow one to create
These allow one to create an addition-type field for multiplication of positive real numbers, so they are useful to perform numerical calculations without calculators, for example, with a slide-rule. Computer scientists tend to be interested in the one to base 2, and the one to base ten is known as the Briggsian, or common, variety. For ten points, name the mathematical functions perhaps best known in their Naperian, or natural variety, that comprise an inverse to exponentials.
These allow one to create an addition-type field for multiplication of positive real numbers, so they are useful to perform numerical calculations without calculators, for example, with a slide-rule.
{logarithm}s