Editing Change of base (section)

In [[mathematics]], '''change of base''' can mean any of several things:
*Changing [[numeral system|numeral bases]], such as converting from base 2 ([[binary numeral system|binary]]) to base 10 ([[decimal]]). This is known as [[base conversion]].
*The logarithmic change-of-base formula, one of the [[Logarithmic identities#Changing the base|logarithmic identities]] used frequently in algebra and calculus.
*The method for changing between polynomial and normal bases, and similar transformations, for purposes of [[coding theory]] and [[cryptography]].
*Construction of the [[fiber product of schemes]], in [[algebraic geometry]].