View source for Squarability

Jordan measurability of a set in the plane (cf. [[Jordan measure|Jordan measure]]). Not every domain (that is, a connected open set) and, furthermore, not every Jordan domain (that is, a domain having a simple closed curve as its boundary) is squarable. On the other hand, a set whose boundary is a [[Rectifiable curve|rectifiable curve]] is squarable.

====References====
<table><TR><TD valign="top">[1]</TD> <TD valign="top">  S.M. Nikol'skii,   "A course of mathematical analysis" , '''2''' , MIR  (1977)  (Translated from Russian)</TD></TR></table>