The standard n-ball is , where . The standard n-ball is also called the unit n-ball or the n-disk.
The notation in the literature for the standard n-ball is not uniform. Sometimes it is denoted by , , or .
The boundary of the standard n-ball is , the n-1-sphere.
A space that is homeomorphic to the standard n-ball is called an n-cell.
A 1-cell is called an arc and a 2-cell is called a disk.
|Date of creation||2013-03-22 16:52:49|
|Last modified on||2013-03-22 16:52:49|
|Last modified by||Mathprof (13753)|