A surface with tetrahedral symmetry which looks like an inflatable chair from the 1970s. It is given by the implicit equation
![(x^2+y^2+z^2-ak^2)^2-b[(z-k)^2-2x^2][(z+k)^2-2y^2]=0.](/images/equations/ChairSurface/NumberedEquation1.svg) |
The surface illustrated above has 
, 
,
and 
.
Chair Surface
See also
Bride's Chair, Cushion SurfaceExplore with Wolfram|Alpha
References
Nordstrand, T. "Chair." http://jalape.no/math/chairtxt.Cite this as:
Weisstein, Eric W. "Chair Surface." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ChairSurface.html