The quintic surface given by the equation

was considered by S. Plouffe (pers. comm., Dec. 21, 1998) and here dubbed the peninsula surface. It has been dubbed the "sofa" surface by Hauser.

## See also

Quintic Surface
## Explore with Wolfram|Alpha

## References

Hauser, H. "Gallery of Singular Algebraic Surfaces:
Sofa." https://homepage.univie.ac.at/herwig.hauser/gallery.html.
## Cite this as:

Weisstein, Eric W. "Peninsula Surface."
From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/PeninsulaSurface.html

## Subject classifications