In mathematics, Dirichlet's unit theorem is a basic result in algebraic number theory due to Gustav Lejeune Dirichlet. It determines the rank of the group of units in the ring OK of algebraic integers of a number field K. The regulator is a positive real number that determines how "dense" the units are.
Read more about Dirichlet's Unit Theorem: Dirichlet's Unit Theorem, The Regulator, Higher Regulators, Stark Regulator
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