Harmonic Range
A set of four Collinear points 
, 
, 
, and 
arranged such that
Hardy (1967) uses the term Harmonic System of Points to refer to a harmonic range.See also Euler Line, Gergonne Line, Harmonic Conjugate Points, Soddy Line
References
Hardy, G. H. A Course of Pure Mathematics, 10th ed. Cambridge, England: Cambridge University Press, pp. 99 and 106, 1967.
- Border Square
- Bordism
- Bordism Group
- Borel-Cantelli Lemma
- Borel Determinacy Theorem
- Borel Measure
- Borel Probability Measure
- Borel Set
- Borel's Expansion
- Borel Sigma Algebra
- Borel Space
- Borromean Rings
- Borrow
- Borsuk's Conjecture
- Borwein Conjectures
- Bouligand Dimension
- Bound
- Boundary
- Boundary Conditions
- Boundary Map
- Boundary Point
- Boundary Set
- Boundary Value Problem
- Bounded
- Bounded Variation