
The metric is spherically symmetric, static, and transversable, in the sense introduced by Morris and Thorne.
(

,

) - polar coordinates

- radius of the wormhole

- new coordinate with

; positive values correspond to points in the top space, negative to points in the bottom space

- thickness of the wormhole
The embedded or "lift"-function is:
E. G. Harris, "Wormhole Connecting Two Reissner-Nordstrom Universes,"
American Journal of Physics,
61(12), 1993 pp. 1140–1144.