Bichromatic Graph
A Graph with Edges of two possible ``colors,'' usually identifiedas red and blue. For a bichromatic graph with 
red Edges and 
blue Edges,
See also Blue-Empty Graph, Extremal Coloring, Extremal Graph, Monochromatic Forced Triangle,Ramsey Number
- Rotation Group
- Rotation Matrix
- Rotation Number
- Rotation Operator
- Roth's Removal Rule
- Roth's Theorem
- Rotkiewicz Theorem
- Rotoinversion
- Rotor
- Rotunda
- Rouché's Theorem
- Roulette
- Round
- Rounding
- Routh-Hurwitz Theorem
- Routh's Theorem
- RSA Encryption
- RSA Number
- Rubber-Sheet Geometry
- Rubik's Clock
- Rubik's Cube
- Rudin-Shapiro Sequence
- Rudvalis Group
- Rule
- Ruled Surface