"Nordstrand's weird surface" is an attractive quartic surface given by the implicit equation
![25[x^3(y+z)+y^3(x+z)+z^3(x+y)]+50(x^2y^2+x^2z^2+y^2z^2)-125(x^2yz+y^2xz+z^2xy)+60xyz-4(xy+xz+yz)=0.](/images/equations/NordstrandsWeirdSurface/NumberedEquation1.svg) |
It has 11 ordinary double points located at 
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and 
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Nordstrand's Weird Surface
See also
Quartic SurfaceExplore with Wolfram|Alpha
References
Nordstrand, T. "Weird Cube." http://jalape.no/math/weirdtxt.Cite this as:
Weisstein, Eric W. "Nordstrand's Weird Surface." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/NordstrandsWeirdSurface.html