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Double Sphere


The double sphere is the degenerate quartic surface

 (x^2+y^2+z^2-r^2)^2=0

obtained by squaring the left-hand side of the equation of a usual sphere

 x^2+y^2+z^2-r^2=0.

See also

Double Bubble, Sphere

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Cite this as:

Weisstein, Eric W. "Double Sphere." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/DoubleSphere.html

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