Complex curvilinear coordinates(?)

[mnb96]

Hello,
a system of curvilinear coordinates is usually expressed by an admissible transformation represented by a set of real scalar functions x_i=x_i(u_1,\ldots,u_n).

Does it make sense to form a system of curvilinear coordinates where the x_i[/tex] and u_i[/tex] functions are <i>complex</i> valued?<br /> If that exists, I cannot find any source in the net.

 

[kof9595995]

Wouldn't that be equivalent to a 2n coordinates? But I'm not quite sure

 

[JSuarez]

They are called "Complex manifolds"; imporatnt examples in Physics are the Calabi-Yau manifolds and Riemann surfaces, see:

http://en.wikipedia.org/wiki/Complex_manifold