- 0.999...
- Abraham Robinson
- Absolute difference
- Absolute value
- Abuse of notation
- Abū Kāmil Shujā ibn Aslam
- Accuracy and precision
- Addition
- Additive identity
- Additive inverse
- Adolf Hurwitz
- Adrien-Marie Legendre
- Affinely extended real number system
- Aleph number
- Alfred Tarski
- Algebra of physical space
- Algebraic number
- Algebraically closed field
- Algorithm
- Algorithmically random sequence
- Almost all
- American Scientist
- Amos Tversky
- Analytic geometry
- ArXiv (identifier)
- Arbitrary-precision arithmetic
- Archimedean field
- Archimedean property
- Associative
- Associative algebra
- Augustin Louis Cauchy
- Axiom
- Axiom of choice
- Axiomatic system
- Baire space (set theory)
- Basis (linear algebra)
- Bibcode (identifier)
- Bicomplex number
- Bijection
- Binary number
- Binary operation
- Bioctonion
- Biquaternion
- Blackboard bold
- Calculator
- Calculus
- Cantor set
- Cantor's diagonal argument
- Cantor's first set theory article
- Cantor's first uncountability proof
- Cantor–Dedekind axiom
- Cardinal number
- Cardinality
- Cardinality of the continuum
- Carol Schumacher
- Cartesian coordinate system
- Cartesian coordinates
- Cartesian product
- Cauchy
- Cauchy sequence
- Charles Hermite
- Chinese mathematics
- Classical mechanics
- Clifford algebra
- Closed-form expression
- Coefficient
- Commutative
- Compact space
- Compiler
- Complete lattice
- Complete metric space
- Complete space
- Completeness (topology)
- Completeness of the real numbers
- Complex conjugate
- Complex number
- Complex plane
- Composite number
- Composition algebra
- Computable number
- Computational science
- Computer algebra system
- Computer data storage
- Computer programming
- Computers
- Connected space
- Constant problem
- Constructible number
- Construction of the real numbers
- Constructive mathematics
- Constructivism (mathematics)
- Continued fraction
- Continuous function
- Continuum hypothesis
- Contractible
- Coordinate space
- Countable
- Countably infinite
- Crelle's Journal
- Cube root
- Cyclic order
- David Hilbert
- Decidability of first-order theories of the real numbers
- Decimal
- Decimal digit
- Decimal expansion
- Decimal fraction
- Decimal representation
- Dedekind complete
- Dedekind completeness
- Dedekind cut
- Dedekind-complete
- Definable number
- Definable real number
- Dense set
- Derivative
- Descartes
- Descriptive set theory
- Dimension
- Displacement (geometry)
- Distance
- Distributive property
- Division (mathematics)
- Division algebra
- Doi (identifier)
- Double-precision floating-point format
- Dual number
- Dual quaternion
- Dual-complex number
- Dyadic rational
- E (mathematical constant)
- Edmund F. Robertson
- Edmund Landau
- Edward N. Zalta
- Edward Nelson
- Edwin Hewitt
- Eigenvector
- Electromagnetism
- Elementary arithmetic
- Encyclopedia of Mathematics
- Equation
- Equivalence class
- Essentially unique
- Euclidean space
- Euler
- European Mathematical Society
- Exponential function
- Exponential growth
- Extended natural numbers
- Extended real number line
- Extension field
- Ferdinand von Lindemann
- Field (mathematics)
- Finite decimal
- First-order logic
- Fixed-point arithmetic
- Floating-point arithmetic
- Floating-point number
- Foundations of Physics
- Fraction
- Fraction (mathematics)
- Fundamental theorem of algebra
- Fuzzy number
- Gaussian integer
- General relativity
- General topology
- Geometric algebra
- Georg Cantor
- Greater than
- Greater than or equal to
- Greek mathematics
- Gregory number
- Haar measure
- Hausdorff dimension
- Helaine Selin
- Henk J. M. Bos
- Hilbert space
- Hilbert spaces
- History of Egypt
- History of mathematics
- Homeomorphic
- Homomorphism
- Hyperbolic quaternion
- Hypercomplex number
- Hyperreal number
- ISBN (identifier)
- If and only if
- Imaginary number
- Indian mathematics
- Infinite sequence
- Infinite set
- Infinitesimal
- Infinitesimal calculus
- Integer
- Internal set theory
- Irrational number
- Isomorphic
- Isomorphism
- JSTOR (identifier)
- Jean Dieudonné
- Johann Heinrich Lambert
- John Archibald Wheeler
- John Mackintosh Howie
- John Stillwell
- Joseph Liouville
- Largest element
- Least element
- Least upper bound
- Lebesgue measure
- Leibniz
- Less than
- Less than or equal to
- Levi-Civita field
- Lie algebra
- Limit (mathematics)
- Limit of a sequence
- Line (geometry)
- Linear combination
- List of types of numbers
- Local compactness
- Long line (topology)
- Löwenheim–Skolem theorem
- MacTutor History of Mathematics Archive
- Magnitude (mathematics)
- Manava
- Mathematical analysis
- Mathematical induction
- Mathematical notation
- Mathematics
- Mathematics in medieval Islam
- Mathematische Annalen
- Matrix (mathematics)
- Measure (mathematics)
- Measurement
- Metric space
- Middle Ages
- Multicomplex number
- Multiplication
- Multiplicative identity
- Multiplicative inverse
- Natural number
- Negative integer
- Negative number
- New York Academy of Sciences
- Non-Archimedean ordered field
- Nonstandard analysis
- Nonstandard model
- Normal number
- Normal operator
- Noun
- Nth root
- Number
- Number line
- Number system
- Numeral base
- Numerical analysis
- Numerical stability
- Octonion
- One
- One-to-one function
- Open interval
- Order relation
- Order topology
- Ordered field
- Ordered group
- Ordered monoid
- Ordered ring
- Ordinal number
- Oxford English Dictionary
- P-adic number
- Paris
- Patrick Suppes
- Paul Cohen (mathematician)
- Paul Gordan
- Peano axioms
- Period (algebraic geometry)
- Peter Koellner
- Pi
- Plane-based geometric algebra
- Point (geometry)
- Polynomial
- Positive real numbers
- Positive-definite
- Power set
- Prime number
- Profinite integer
- Pythagoras
- Quadratic equation
- Quantity
- Quantum mechanics
- Quaternion
- R. Duncan Luce
- Rational number
- Rational zeta series
- Real analysis
- Real closed field
- Real coordinate space
- Real function
- Real line
- Real projective line
- René Descartes
- Repeating decimal
- Reverse mathematics
- Root of a polynomial
- S2CID (identifier)
- Saunders Mac Lane
- Scientific notation
- Sedenion
- Self-adjoint operator
- Separable space
- Separation relation
- Sequence
- Set (mathematics)
- Set theory
- Shulba Sutras
- Significant figures
- Simon Stevin
- Simply connected
- Smooth manifolds
- Solenoid (mathematics)
- Solomon Feferman
- Spacetime algebra
- Split-biquaternion
- Split-complex number
- Split-octonion
- Split-quaternion
- Springer Science+Business Media
- Springer-Verlag
- Square root
- Square root of 2
- Standard model
- Subfield (mathematics)
- Subset
- Subtraction
- Successor function
- Supernatural number
- Superreal number
- Supremum
- Surreal number
- Symbolic computation
- Tarski's axiomatization of the reals
- Temperature
- Theorem
- Time
- Topological group
- Topological space
- Topology
- Total order
- Transcendental number
- Transcendental numbers
- Tuple
- Type conversion
- Ubiratan D'Ambrosio
- Umberto Bottazzini
- Uncountable
- Uncountable set
- Undecidable problem
- Uniform space
- Unit complex number
- Unit interval
- Univariate polynomial
- University of St Andrews
- Up to
- Upper bound
- V=L
- Vector space
- Vedic civilization
- Vitali set
- Wayback Machine
- Well-order
- Well-ordering theorem
- Yiannis N. Moschovakis
- Zermelo–Fraenkel
- Zermelo–Fraenkel set theory
- Zero
- Zero of a function
- École Normale Supérieure