Euler's Pentagonal Number Theorem
 | (1) |
are generalized Pentagonal Numbers. Related equalities are | (2) |
 | (3) |
- Cauchy's Rigidity Theorem
- Cauchy Test
- Caustic
- Cavalieri's Principle
- Cayley Algebra
- Cayley-Bacharach Theorem
- Cayley Cubic
- Cayley Graph
- Cayley-Hamilton Theorem
- Cayleyian Curve
- Cayley-Klein-Hilbert Metric
- Cayley-Klein Parameters
- Cayley Number
- Cayley's Group Theorem
- Cayley's Hypergeometric Function Theorem
- Cayley's Ruled Surface
- Cayley's Sextic
- Cayley's Sextic Evolute
- Cayley Tree
- C-Curve
- C-Determinant
- Cech Cohomology
- Ceiling Function
- Cell
- Cellular Automaton