Cushion
The Quartic Surface resembling a squashed round cushion on a barroom stool and given by the equation
See also Quartic Surface
References
Nordstrand, T. ``Surfaces.'' http://www.uib.no/people/nfytn/surfaces.htm.
- Acnode
- Acoptic Polyhedron
- Action
- Acute Angle
- Acute Triangle
- Adams-Bashforth-Moulton Method
- Adams' Method
- Addend
- Addition
- Addition Chain
- Addition-Multiplication Magic Square
- Additive Persistence
- Adem Relations
- Adequate Knot
- Adiabatic Invariant
- Adjacency Matrix
- Adjacency Relation
- Adjacent Fraction
- Adjacent Value
- Adjacent Vertices
- Adjoint Curve
- Adjoint Matrix
- Adjoint Operator
- Adjugate Matrix
- Adjunction