Unit ball
= Unit ball
{wiki=Unit_ball}
The unit ball of a <normed vector space> is $\{x:\lVert x\rVert\leq1\}$ under the closed-ball convention.
= Unit ball
{wiki=Unit_ball}
The unit ball of a <normed vector space> is $\{x:\lVert x\rVert\leq1\}$ under the closed-ball convention.