Definition:Valuation Ring Induced by Non-Archimedean Norm

Definition
Let $\struct {R, \norm {\,\cdot\,} }$ be a non-Archimedean normed division ring with zero $0_R$.

The valuation ring induced by the non-Archimedean norm $\norm{\,\cdot\,}$ is the set:
 * $\OO = \set {x \in R: \norm x \le 1}$

That is, the valuation ring induced by the non-Archimedean norm $\norm{\,\cdot\,}$ is the closed ball $\map {B_1^-} {0_R}$.

Also See

 * Valuation Ring of Non-Archimedean Division Ring is Subring: the valuation ring induced by the norm $\norm{\,\cdot\,}$ is a subring of $R$.


 * Definition:Valuation Ideal Induced by Non-Archimedean Norm


 * Valuation Ideal is Maximal Ideal of Induced Valuation Ring: the valuation ideal is an ideal that is a maximal left ideal and a maximal right ideal of the valuation ring induced by the norm.


 * Definition:Residue Division Ring Induced by Non-Archimedean Norm