Algebraic Invariant
A quantity such as a Discriminant which remains unchanged under a given class ofalgebraic transformations. Such invariants were originally called Hyperdeterminants byCayley. 
References
Grace, J. H. and Young, A. The Algebra of Invariants. New York: Chelsea, 1965. Gurevich, G. B. Foundations of the Theory of Algebraic Invariants. Groningen, Netherlands: P. Noordhoff, 1964. Hermann, R. and Ackerman, M. Hilbert's Invariant Theory Papers. Brookline, MA: Math Sci Press, 1978. Hilbert, D. Theory of Algebraic Invariants. Cambridge, England: Cambridge University Press, 1993. Mumford, D.; Fogarty, J.; and Kirwan, F. Geometric Invariant Theory, 3rd enl. ed. New York: Springer-Verlag, 1994.
Invariants
- Circle Lattice Theorem
- Circle Map
- Circle Method
- Circle Negative Pedal Curve
- Circle Notation
- Circle Order
- Circle Orthotomic
- Circle Packing
- Circle Pedal Curve
- Circle-Point Midpoint Theorem
- Circle Radial Curve
- Circles-and-Squares Fractal
- Circle Squaring
- Circle Strophoid
- Circle Tangents
- Circuit
- Circuit Rank
- Circulant Determinant
- Circulant Graph
- Circulant Matrix
- Circular Cylindrical Coordinates
- Circular Functions
- Circular Permutation
- Circumcenter
- Circumcircle