Crucial Point
The Homothetic Center of the Orthic Triangle and the triangular hull of the three Excircles. It has Triangle Center Function
References
Kimberling, C. ``Central Points and Central Lines in the Plane of a Triangle.'' Math. Mag. 67, 163-187, 1994. Lyness, R. and Veldkamp, G. R. Problem 682 and Solution. Crux Math. 9, 23-24, 1983.
- Quintuplet
- Quota Rule
- Quota System
- Quotient
- Quotient-Difference Algorithm
- Quotient-Difference Table
- Quotient Group
- Quotient Ring
- Quotient Rule
- Quotient Space
- q-Vandermonde Sum
- R
- R-
- R+
- Raabe's Test
- Rabbit Constant
- Rabbit-Duck Illusion
- Rabbit Sequence
- Rabdology
- Rabin-Miller Strong Pseudoprime Test
- Rabinovich-Fabrikant Equation
- Racah V-Coefficient
- Racah W-Coefficient
- Radau Quadrature
- Rademacher Function