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Discrete Valuation


A discrete valuation on a field K is a nontrivial function v:K->Z union {infty} such that v(0)=infty, v(xy)=v(x)+v(y), and v(x+y)>=min{v(x),v(y)}. It is normalized if v(K^×)=Z. The associated valuation ring is O_v={x:v(x)>=0}, and its unique maximal ideal is m_v={x:v(x)>0}.


See also

Local Field, Maximal Ideal, Valuation, Valuation Ring

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References

Serre, J.-P. Local Fields. New York: Springer-Verlag, 1979.

Cite this as:

Weisstein, Eric W. "Discrete Valuation." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/DiscreteValuation.html

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