• R
• R-
• R+
• r(n)
• R-Estimate
• 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
• Radial Curve
• Radial Point
• Radian
• Radiant Point
• Radical
• Radical Axis
• Radical Center
• Radical Integer
• Radical Line
• Radicand
• Radius
• Radius of Convergence
• Radius of Curvature
• Radius (Graph)
• Radius of Gyration
• Radius of Torsion
• Radius Vector
• Radix
• Rado's Sigma Function
• Radon-Nikodym Theorem
• Radon Transform
• Radon Transform--Cylinder
• Radon Transform--Delta Function
• Radon Transform--Gaussian
• Radon Transform--Square
• Railroad Track Problem
• Ramanujan 6-10-8 Identity
• Ramanujan Constant
• Ramanujan Continued Fraction
• Ramanujan Cos/Cosh Identity
• Ramanujan-Eisenstein Series
• Ramanujan Function
• Ramanujan g- and G-Functions
• Ramanujan's Hypergeometric Identity
• Ramanujan's Hypothesis
• Ramanujan's Identity
• Ramanujan's Integral
• Ramanujan's Interpolation Formula
• Ramanujan's Master Theorem
• Ramanujan-Petersson Conjecture
• Ramanujan Psi Sum
• Ramanujan's Square Equation
• Ramanujan's Sum
• Ramanujan's Sum Identity
• Ramanujan's Tau-Dirichlet Series
• Ramanujan's Tau Function
• Ramanujan Theta Functions
• Ramp Function
• Ramphoid Cusp
• Ramsey Number
• Ramsey's Theorem
• Randelbrot Set
• Random Distribution
• Random Dot Stereogram
• Random Graph
• Random Matrix
• Random Number
• Random Percolation
• Random Polynomial
• Random Variable
• Random Walk
• Random Walk--1-D
• Random Walk--2-D
• Random Walk--3-D
• Range (Image)
• Range (Line Segment)
• Range (Statistics)
• Rank
• Rank (Group)
• Rank (Quadratic Form)
• Rank (Sequence)
• Rank (Statistics)
• Rank (Tensor)
• Ranunculoid
• RAT-Free Set
• Ratio
• Ratio Distribution
• Ratio Test
• Rational Approximation
• Rational Canonical Form
• Rational Cuboid
• Rational Distances
• Rational Domain
• Rational Double Point
• Rational Function
• Rational Integer
• Rational Number
• Rational Point
• Rational Quadrilateral
• Rational Triangle
• RATS Sequence
• Ray
• Rayleigh Differential Equation
• Rayleigh Distribution
• Rayleigh's Formulas
• Rayleigh-Ritz Variational Technique
• Rayleigh's Theorem
• Re-Entrant Circuit
• Real Analysis
• Real Axis
• Real Function
• Real Line
• Real Matrix
• Real Number
• Real Part
• Real Polynomial
• Real Projective Plane
• Real Quadratic Field
• Realizer
• Rearrangement Theorem
• Reciprocal
• Reciprocal Difference
• Reciprocal Polyhedron
• Reciprocating Sphere
• Reciprocation
• Reciprocity Theorem
• Rectangle
• Rectangle Function
• Rectangle Squaring
• Rectangular Coordinates
• Rectangular Distribution
• Rectangular Hyperbola
• Rectangular Parallelepiped
• Rectangular Projection
• Rectifiable Current
• Rectifiable Set
• Rectification
• Rectifying Latitude
• Rectifying Plane
• Recurrence Relation
• Recurrence Sequence
• Recurring Digital Invariant
• Recursion
• Recursive Function
• Recursive Monotone Stable Quadrature
• Red-Black Tree
• Red Net
• Reduced Amicable Pair
• Reduced Fraction
• Reduced Latitude
• Reducible Crossing
• Reducible Representation
• Reducible Matrix
• Reduction of Order
• Reduction Theorem
• Redundancy
• Reeb Foliation
• Reef Knot
• Refinement
• Reflection
• Reflection Property
• Reflection Relation
• Reflexible
• Reflexible Map
• Reflexive Closure
• Reflexive Graph
• Reflexive Reduction
• Reflexive Relation
• Reflexivity
• Region
• Regression
• Regression Coefficient
• Regula Falsi
• Regular Function
• Regular Graph
• Regular Isotopy
• Regular Isotopy Invariant
• Regular Local Ring
• Regular Number
• Regular Parameterization
• Regular Patch
• Regular Point
• Regular Polygon
• Regular Polyhedron
• Regular Prime
• Regular Ring
• Regular Sequence
• Regular Singular Point
• Regular Singularity
• Regular Surface
• Regular Triangle Center
• Regularity Theorem
• Regularized Beta Function
• Regularized Gamma Function
• Regulus
• Reidemeister Moves
• Reidemeister's Theorem
• Reinhardt Domain
• Relation
• Relative Error
• Relative Extremum
• Relative Maximum
• Relative Minimum
• Relatively Prime
• Relaxation Methods
• Remainder
• Remainder Theorem
• Rembs' Surfaces
• Removable Crossing
• Removable Singularity
• Rencontres Number
• Rendezvous Values
• Rényi's Parking Constants
• Rep-Tile
• Repartition
• Repdigit
• Repeating Decimal
• Repfigit Number
• Replicate
• Reptend Prime
• Representation
• Repunit
• Residual
• Residual vs. Predictor Plot
• Residue Class
• Residue (Complex Analysis)
• Residue (Congruence)
• Residue Index
• Residue Theorem (Complex Analysis)
• Residue Theorem (Group)
• Resolution
• Resolution Class
• Resolution Modulus
• Resolvable
• Resolving Tree
• Resonance Overlap
• Resonance Overlap Method
• Restricted Divisor Function
• Restricted Growth Function
• Restricted Growth String
• Resultant
• Retardance
• Reuleaux Polygon
• Reuleaux Triangle
• Reversal
• Reverse Greedy Algorithm
• Reversion of Series
• Reverse-Then-Add Sequence
• Reznik's Identity
• Rhodonea
• Rhomb
• Rhombic Dodecahedral Number
• Rhombic Dodecahedron
• Rhombic Icosahedron
• Rhombic Polyhedron
• Rhombic Triacontahedron
• Rhombicosacron
• Rhombicosahedron
• Rhombicosidodecahedron
• Rhombicuboctahedron
• Rhombidodecadodecahedron
• Rhombihexacron
• Rhombihexahedron
• Rhombitruncated Cuboctahedron
• Rhombitruncated Icosidodecahedron
• Rhombohedron
• Rhomboid
• Rhomboidal Dodecahedron
• Rhombus
• Rhumb Line
• Ribbon Knot
• Ribet's Theorem
• Riccati-Bessel Functions
• Riccati Differential Equation
• Ricci Curvature
• Ricci Tensor
• Rice Distribution
• Richard's Paradox
• Richardson Extrapolation
• Richardson's Theorem
• Ridders' Method
• Ridge
• Riemann-Christoffel Tensor
• Riemann Curve Theorem
• Riemann Differential Equation
• Riemann's Formula
• Riemann Function
• Riemann Hypothesis
• Riemann Integral
• Riemann's Integral Theorem
• Riemann-Lebesgue Lemma
• Riemann-Mangoldt Function
• Riemann Mapping Theorem
• Riemann's Moduli Problem
• Riemann's Moduli Space
• Riemann P-Differential Equation
• Riemann P-Series
• Riemann-Roch Theorem
• Riemann Series Theorem
• Riemann-Siegel Functions
• Riemann Space
• Riemann Sphere
• Riemann-Stieltjes Integral
• Riemann Sum
• Riemann Surface
• Riemann Tensor
• Riemann Theta Function
• Riemann Weighted Prime-Power Counting Function
• Riemann Xi Function
• Riemann Zeta Function
• Riemannian Geometry
• Riemannian Geometry (Non-Euclidean)
• Riemannian Manifold
• Riemannian Metric
• Riesel Number
• Riesz-Fischer Theorem
• Riesz Representation Theorem
• Riesz's Theorem
• Riffle Shuffle
• Rigby Points
• Right Angle
• Right Conoid
• Right Hyperbola
• Right Line
• Right Strophoid
• Right Strophoid Inverse Curve
• Right Triangle
• Rigid
• Rigid Motion
• Rigidity Theorem
• Ring
• Ring Cyclide
• Ring Function
• Ring Torus
• Ringoid
• Risch Algorithm
• Rising Factorial
• Rivest-Shamir-Adleman Number
• RMS
• Robbin Constant
• Robbin's Inequality
• Robbins Algebra
• Robbins Equation
• Robertson Condition
• Robertson Conjecture
• Robertson-Seymour Theorem
• Robin Boundary Conditions
• Robin's Constant
• Robinson Projection
• Robust Estimation
• Rodrigues's Curvature Formula
• Rodrigues Formula
• Rogers-Ramanujan Continued Fraction
• Rogers-Ramanujan Identities
• Rolle's Theorem
• Roman Coefficient
• Roman Factorial
• Roman Numeral
• Roman Surface
• Roman Symbol
• Romberg Integration
• Rook Number
• Rook Reciprocity Theorem
• Rooks Problem
• Room Square
• Root
• Root Dragging Theorem
• Root Linear Coefficient Theorem
• Root-Mean-Square
• Root (Radical)
• Root Test
• Root (Tree)
• Root of Unity
• Rooted Tree
• Rosatti's Theorem
• Rose
• Rosenbrock Methods
• Rössler Model
• Rotation
• Rotation Formula
• 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
• Rule of 72
• Ruled Surface
• Ruler
• Ruler Function
• Ruling
• Run
• Runge-Kutta Method
• Runge-Walsh Theorem
• Running Knot
• Russell's Antinomy
• Russell's Paradox
• Russian Multiplication
• Russian Roulette
• Ryser Formula

---

© 1996-9 Eric W. Weisstein
1999-05-25