A minimalembedded surface discovered in 1992 consisting of a helicoid
with a hole and handle (Science
News 1992). It has the same topology as a punctured
sphere with a handle, and is only the second complete embedded minimal surface of
finite topology and infinite total curvature discovered (the helicoid
being the first).
A three-ended minimal surface of genus
1 is sometimes also called Hoffman's minimal surface (Peterson 1988).