Tanglecube

A Quartic Surface given by the implicit equation

$$x^4-5x^2+y^4-5y^2+z^4-5z^2+11.8=0.$$

References

Banchoff, T. ``The Best Homework Ever?'' http://www.brown.edu/Administration/Brown_Alumni_Magazine/97/12-96/features/homework.html.

Nordstrand, T. ``Tangle.'' http://www.uib.no/people/nfytn/tangltxt.htm.