Definition:Valuation Ideal Induced by Non-Archimedean Norm

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

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

That is, the valuation ideal induced by the non-Archimedean norm $\norm{\,\cdot\,}$ is the open ball $B_1 \paren {0_R}$.

Also see

 * 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:Valuation Ring Induced by Non-Archimedean Norm


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


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