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Quadratic Surfaces
Change the parameters to see how quadratic surfaces go from convex to concave, or perhaps have saddle points.
Contributed by:
Stephen Wolfram
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Quadratic
(
Wolfram
MathWorld
)
PERMANENT CITATION
"
Quadratic Surfaces
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/QuadraticSurfaces/
Contributed by:
Stephen Wolfram
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