A map from a domain is called a map of class if each component of
is of class ( or ) in , where denotes a continuous function which is differentiable times.
A map from a domain is called a map of class if each component of
is of class ( or ) in , where denotes a continuous function which is differentiable times.
Weisstein, Eric W. "Map Class." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/MapClass.html