C-Matrix
Any Symmetric Matrix (
) or Skew Symmetric Matrix (
) 
withdiagonal elements 0 and others 
satisfying
where I is the Identity Matrix, is known as a
-matrix (Ball and Coxeter 1987). Examples include |  |  | |
 | |  |
References
Ball, W. W. R. and Coxeter, H. S. M. Mathematical Recreations and Essays, 13th ed. New York: Dover, pp. 308-309, 1987.
- Hypoellipse
- Hypotenuse
- Hypothesis
- Hypothesis Testing
- Hypotrochoid
- Hypotrochoid Evolute
- Hyzer's Illusion
- Hénon Attractor
- Hénon-Heiles Equation
- Hénon Map
- Hölder Condition
- Hölder Integral Inequality
- Hölder Sum Inequality
- i
- I
- Iamond
- Ice Fractal
- Icosagon
- Icosahedral Equation
- Icosahedral Graph
- Icosahedral Group
- Icosahedron
- Icosahedron Stellations
- Icosian Game
- Icosidodecadodecahedron