Talk:Spherically complete field

open balls?

The topological field of real numbers is locally compact, but the decreasing sequence of balls given by the open intervals (0, 1/n) has empty intersection.

Therefore, while in the non-archimedean case, open and closed balls can be interchangeably used, is this still true in the archimedean case, or might it be necessary to stipulate open balls? — Preceding unsigned comment added by 179.235.134.104 (talk) 23:57, 19 March 2019 (UTC)

Unless I'm wrong, on the contrary, this example shows that one should stipulate closed balls! (As you say, R is spherically complete since locally compact.) — MFH:Talk 16:39, 20 June 2019 (UTC)

why only fields?

Why has Wikipedia "spherically complete" only for fields? This notion makes sense in any metric space, doesn't it? — MFH:Talk 16:42, 20 June 2019 (UTC)

Can you create a spherical completion of any normed field?

The article does not mention circumstances when one may create a spherical completion of a field that is not already spherically complete.

That would be a very useful addition to this article.