This metric describes a'hypercatenoid'similar to the equatorial catenoid of the static wormhole, with the radius n of the throat ( where \ rho = 0 ) now replaced by a c | t |, and in general each circle of latitude of geodesic radius \ rho having circumferential radius \ textstyle r ( t, \ rho ) = \ sqrt { ( 1 + a ^ 2 ) \ rho ^ 2 + a ^ 2 c ^ 2 t ^ 2 }.
