Definition talk:Ball

The problem with Ball is that its classification is not "1-dimensional":
 * closed vs. open, unit vs. arbitrary, real vs. metric space vs. Banach space vs ...

That is, if we organize this with subpages, there will be one "dimension" according to which the subpages are organized, and the other two can only be disambiguations, or we have to transclude subpages of other pages. --barto (talk) (contribs) 03:48, 16 November 2017 (EST)