Wikipedia:Missing science topics/ExistingMathR
- R
- R-algebra
- R-module
- Raabe's test
- Rabbit Sequence or Rabbit sequence
- Rabdology
- Rabin-miller strong pseudoprime test or Rabin-Miller strong pseudoprime test
- Rabinovich-Fabrikant equation
- Radial basis function
- Radian
- Radical
- Radical (mathematics)
- Radical axis
- Radical center
- Radical of an ideal
- Radical of an integer
- Radical of rings and algebras
- Radical root
- Radicand
- Radius
- Radius of convergence
- Radius of curvature
- Radius of Gyration or Radius of gyration
- Radius vector
- Radix
- Radix sort
- Rado's theorem or Rado's Theorem
- Radon integral
- Radon measure
- Radon transform or Radon Transform
- Radon's lemma
- Radon's theorem
- Radon-Nikodym Derivative or Radon-Nikodym derivative
- Radon-Nikodym Theorem or Radon-Nikodym theorem or Radon-Nikodým theorem
- Ramanujan
- Ramanujan hypothesis
- Ramanujan theta functions
- Ramanujan's tau function
- Ramanujan-Petersson conjecture
- Ramanujan-Soldner constant
- Ramification group
- Ramification index
- Ramification point
- Ramsey number
- Ramsey theorem
- Ramsey Theory or Ramsey theory
- Ramsey's Theorem or Ramsey's theorem
- Random
- Random distribution
- Random dot stereogram
- Random event
- Random field
- Random function
- Random graph
- Random mapping
- Random matrix
- Random number
- Random numbers
- Random permutation
- Random sequence
- Random Variable or Random variable
- Random variate
- Random vector
- Random walk
- Randomization
- Randomization test
- Range
- Range (mathematics)
- Range problem
- Rank
- rank
- Rank of an elliptic curve
- Rank-nullity theorem
- Rate of convergence
- Ratio
- Ratio test
- Rational
- Rational canonical form
- Rational curve
- Rational domain
- Rational function
- Rational integer
- Rational mapping
- Rational Number or Rational number
- Rational point
- Rational root theorem
- Rational singularity or Rational Singularity
- Rational surface
- Rational triangle
- Rational variety
- Rationalise
- Rationals
- Raw moment
- Ray
- Rayleigh distribution
- Rayleigh quotient
- Rayleigh-Taylor instability
- Re or RE
- Real analysis
- Real analytic function
- Real and complex embeddings
- Real axis
- Real closed field
- Real form
- Real Function or Real function
- Real line
- Real matrix
- Real measure
- Real number
- Real Numbers or Real numbers
- Real part
- Real projective plane
- Real projective space
- Real quadratic field
- Real tree
- Real variable
- Real vector
- Real vector bundle
- Real vector space
- Real-valued function
- Realization
- Realizer
- Reals
- Rearrangement inequality
- Reciprocal
- Reciprocal difference
- Reciprocal polynomial
- Reciprocation
- Reciprocity law
- Reciprocity laws
- Reciprocity Theorem or Reciprocity theorem
- Recognize
- Rectangle
- Rectangle function
- Rectangular Coordinates or Rectangular coordinates
- Rectangular distribution
- Rectifiable
- Rectifiable curve
- Rectifiable Set or Rectifiable set
- Rectification
- Recurrence equation
- Recurrence plot
- Recurrence relation
- Recurrent relation
- Recurring decimal
- Recursion
- Recursion Theorem or Recursion theorem
- Recursive definition
- Recursive function
- Recursive Sequence or Recursive sequence
- Recursive set
- Recursively Enumerable Set or Recursively enumerable set
- Red-Black Tree or Red-black tree
- Reduce
- Reduced ring
- Reduced row echelon form
- Reduced scheme
- Reducible
- Reducible representation
- Reductio ad absurdum
- Reduction of Order or Reduction of order
- Reduction of structure group
- Reductive group
- Redundancy
- Ree group
- Reeb foliation
- Reed-Sloane algorithm
- Reef Knot or Reef knot
- Refal
- Refinement
- Reflection
- Reflection Formula or Reflection formula
- Reflection group
- Reflection principle
- Reflection Relation or Reflection relation
- Reflective subcategory
- Reflector
- Reflex angle
- Reflexive
- Reflexive Banach space
- Reflexive space
- Reflexivity
- Refraction
- Region
- Register machine
- Regression
- Regression analysis
- Regression model
- Regression to the Mean or Regression to the mean
- Regula falsi
- Regular element
- Regular Expression or Regular expression
- Regular function
- Regular graph
- Regular group action
- Regular language
- Regular local ring
- Regular matrix
- Regular measure
- Regular Number or Regular number
- Regular open set
- Regular polygon
- Regular polygons
- Regular polyhedra
- Regular polyhedron
- Regular polytope
- Regular prime
- Regular representation
- Regular sequence
- Regular singular point
- Regular singularity
- Regular space
- Regularization
- Regularized gamma function or Regularized Gamma function
- Regulator
- Regulus
- Reidemeister moves
- Related rates
- Relation
- Relation (mathematics)
- Relational structure
- Relative Degree
- Relative entropy
- Relative error
- Relative Frequency or Relative frequency
- Relative homology
- Relative homology groups
- Relative topology
- Relatively compact
- Relatively prime
- Relatively-compact set
- Relativistic dynamics
- Relativistic invariance
- Relativity principle
- Relativity theory
- Reliability theory
- Remainder
- Remainder of an integer
- Remainder term
- Remainder Theorem or Remainder theorem
- Removable set
- Removable singular point
- Removable singularity
- Rencontres number
- Renewal theory
- Renormalization
- Rényi entropy
- Repdigit
- Repeated integral
- Repeating Decimal or Repeating decimal
- Repfigit number
- Replica
- Replicate
- Representable functor
- Representation
- Representation of a group
- Representation of a Lie algebra
- Representation theory
- Representations of Lie algebras
- Representations of Lie groups
- Reproducing kernel
- Reproducing-kernel Hilbert space
- Reptile
- Repunit
- Resampling statistics
- Residual
- Residue
- Residue (complex analysis)
- Residue class
- Residue of an analytic function
- Residue theorem
- Resistance distance
- Resolution
- Resolve
- Resolvent
- Resonance
- Restricted direct product
- Restricted representation
- Resultant
- Retract
- Retraction
- Reuleaux polygon
- Reuleaux triangle
- Reve's puzzle
- Reversal
- Reverse Polish Notation or Reverse Polish notation or Reverse polish notation
- Reversible prime
- Reversion of series
- Reynolds number
- Rhetoric
- Rhind Papyrus or Rhind papyrus
- Rhomb
- Rhombic dodecahedron
- Rhombic enneacontahedron
- Rhombic icosahedron
- Rhombic triacontahedron
- Rhombicosahedron
- Rhombicosidodecahedron
- Rhombicuboctahedron
- Rhombidodecadodecahedron
- Rhombitruncated cuboctahedron
- Rhombohedron
- Rhomboid
- Rhombus
- Rhumb Line or Rhumb line
- Riccati equation
- Ricci curvature
- Ricci curvature tensor
- Ricci flow
- Ricci tensor
- Rice distribution
- Rice's Theorem or Rice's theorem
- Richard paradox or Richard Paradox
- Richard's paradox
- Richardson extrapolation
- Ridge
- Riemann curvature tensor
- Riemann differential equation
- Riemann geometry
- Riemann hypotheses
- Riemann hypothesis or Riemann Hypothesis
- Generalized Riemann hypothesis or Generalized Riemann Hypothesis
- Riemann integral
- Riemann lemma
- Riemann mapping theorem
- Riemann P-differential equation
- Riemann series theorem
- Riemann sphere
- Riemann Sum or Riemann sum
- Riemann surface
- Riemann tensor
- Riemann theta function
- Riemann theta-function
- Riemann Zeta Function or Riemann zeta function
- Riemann Zeta Function or Riemann zeta function
- Riemann zeta-function
- Riemann-Christoffel curvature tensor
- Riemann-Christoffel tensor
- Riemann-Hilbert problem
- Riemann-Hurwitz formula
- Riemann-Kempf singularity theorem
- Riemann-Lebesgue lemma
- Riemann-Roch Theorem or Riemann-Roch theorem
- Riemann-Stieltjes Integral or Riemann-Stieltjes integral
- Riemannian connection
- Riemannian curvature
- Riemannian geometry
- Riemannian manifold
- Riemannian metric
- Riemannian submersion
- Riesel number
- Riesel problem
- Riesz representation theorem
- Riesz-Fischer Theorem or Riesz-Fischer theorem
- Rig
- Rigged Hilbert space or Rigged hilbert space
- Rigged manifold
- Right Angle or Right angle
- Right ascension or Right Ascension
- Right circular cone
- Right circular cylinder
- Right coset
- Right cylinder
- Right ideal
- Right transversal
- Right triangle
- Right-hand rule
- Right-handed coordinate system
- Rigid
- Rigid motion
- Rigidity
- Rigorous
- Ring
- Ring (mathematics)
- Ring extension
- Ring homomorphism
- Ring of endomorphisms
- Ring of fractions
- Ring of integers
- Ring of polynomials
- Ring of sets
- Ring spectrum
- Ring theory
- Ring with identity
- Ringed space
- Risch algorithm
- Rise
- Rising factorial
- Risk theory
- Ritz method
- RK4
- RMS or Rms
- Robertson-Seymour theorem
- Robinson projection
- Robust statistics
- Rodrigues formula
- Rodrigues' rotation formula
- Rogers-Ramanujan identities
- Rogers-Ramanujan identity
- Rolle theorem
- Rolle's theorem
- Roller
- Roman Numerals or Roman numerals
- Roman surface
- Romberg integration
- Root or ROOT
- Root (mathematics)
- Root group
- Root Node or Root node
- Root of unity
- Root system
- Root test
- Root-finding algorithm
- Root-mean-square
- Rooted graph
- Rooted tree
- Roots
- Rose
- Rosenbrock function
- Rosser's theorem
- Rössler Attractor
- Rotation
- Rotation group
- Rotation matrix
- Rotation number
- Rotation of a vector field
- Rotation operator
- Roth's theorem
- Rotoinversion
- Rotor
- Rotunda
- Rouché's theorem
- Roulette
- Round
- Round number
- Round Robin tournament or Round robin tournament
- Rounding
- Rounding error
- Roundness
- Roundoff error
- Route
- Routh's theorem
- Routh-Hurwitz theorem
- Row echelon form
- Row space
- Row vector
- Row-reduced echelon form
- RPN or Rpn
- RSA or Rsa
- RSA encryption
- RSA number
- Rubik's Clock
- Rubik's Cube or Rubik's cube
- Rudvalis group
- Rule
- Rule 110
- Rule 30
- Rule of 72
- Rule of inference
- Rule of nines
- Rule of signs
- Ruled Surface or Ruled surface
- Ruler
- Ruler and compass
- Rumors
- Run
- Run-length encoding
- Runge's Theorem or Runge's theorem
- Runge-Kutta method
- Running knot
- Running time
- Russell paradox
- Russell's antinomy
- Russell's Paradox or Russell's paradox
- Russian multiplication
- Russian Roulette or Russian roulette