Liouville surface

In the mathematical field of differential geometry a Liouville surface is a type of surface which in local coordinates may be written as a graph in R³

$z=f(x,y)$

such that the first fundamental form is of the form

$ds^2 = (f_1(x) + f_2(y))(dx^2+dy^2).\,$

Sometimes a metric of this form is called a Liouville metric. Every surface of revolution is a Liouville surface.

References

• (Translated from the Russian by R. Silverman.)