Saccheri --
Saccheri, Giovanni Gerolamo --
Sadleirian Chair --
Sainte-Laguë method --
Salamin-Brent algorithm --
Saradha, K --
Sarkovskii's theorem --
Satge, Philippe --
Satisfiability --
Sato, Mikio --
Saunderson, Nicolas --
Sawtooth wave --
Scalar --
Scalar curvature --
Scalar field --
Scalar multiplication --
Scheme --
Schneier --
Schneier, Bruce --
Schnirelmann --
Schnirelmann, L. G --
Schnirelmann density --
Schooten, Frans van --
Schrödinger, Erwin --
Schrödinger equation --
Schur complement --
Schur decomposition --
Schwartz, Laurent --
Schwinger, Julian --
Scientific notation --
Schwarzschild metric --
Scott, Dana --
Scottish Café --
Scytale --
Search algorithm --
Sectional curvature --
Secant --
Second-order logic --
Sedenion --
Seifert-van Kampen theorem --
Selberg --
Selberg, Atle --
Self-adjoint operator --
Self-similar --
Sellmeier equation --
Selten --
Selten, Reinhart --
Semantic network --
Semi-continuous --
Semidirect product --
Semigroup --
Semiperfect magic cube --
Semiperfect number --
Semiprime --
Semiring --
Semisimple --
Semisimple ring --
Senary --
Sensitivity --
Separability --
Separable --
Separable extension --
Separable polynomial --
Separated sets --
Separation axiom --
Separation of variables --
Sequence --
Series --
Serre --
Serre, Jean-Pierre --
Set --
Set-builder notation --
Set-theoretic intersection -- see: Intersection (set theory) --
Set-theoretic union -- see: Union (set theory) --
Set theory --
Seven bridges of Königsberg --
Sexagesimal --
Sextant --
Sexy prime --
SHA-1 --
Shanks, Daniel --
Shannon, Claude E --
Shannon capacity --
Shannon-Fano coding --
Shannon-Hartley law --
Shannon switching game --
Shannon's theorem --
Shape --
Shapley value --
Sharp-P --
Sharp-P-complete --
Sheaf --
Sheaf space --
Shear --
Sheffer sequence --
Sheffer stroke --
Shelah, Saharon --
Shell integration --
Shellsort --
Shijie --
Shijie, Zhu --
Shimura, Goro --
Shor's algorithm --
Short five lemma --
Shortest path problem --
Sierpinski carpet --
Sierpinski gasket --
Sierpinski number --
Sierpinski number --
Sierpinski space --
Sierpinski, Waclaw --
Sieve of Eratosthenes --
SIGINT --
Sigma algebra --
Sigma function --
Sigma-algebra --
Sigma-compactness --
Sign convention --
Significant figure --
Similarity (mathematics) --
Simple group --
Simple harmonic motion --
Simple Lie group --
Simple module --
A simple proof that 22/7 exceeds &pi --
Simple theorems in set theory --
Simplex --
Simplex algorithm --
Simplicial complex --
Simply connected --
Simpson's paradox --
Simpson's rule --
Simulated annealing --
Simultaneity --
Simultaneous equations --
Simultaneous equation model --
Sine --
Sine wave --
Isadore Singer --
Singleton --
Singular value decomposition --
Singular-value decomposition --
SIS --
Skein relation --
Skewes' number --
Skewness --
Skew-symmetric --
Skew-symmetric matrix --
Skolem normal form --
Skolem, Thoralf --
Slide rule --
Sliding puzzle --
Slightly defective number --
Sloane --
Sloane, Neil --
Slope --
Smale --
Smale, Stephen --
Small-angle formula --
Small number --
Small world phenomenon --
Smith, Henry John Stephen --
Smith, John Maynard --
Smith numbers --
Smooth Talk:Smooth --
Smooth function Talk:Smooth function --
Snake lemma --
Snell, Willebrord --
Snub cube --
Snub dodecahedron --
Soap film --
Sobolev, Sergei L'vovich --
Sociable number --
Social statistics --
Sokhotski, Yulian Vasilievich --
Soldner's constant --
Solid --
Solid angle --
Soliton --
Soliton (topological) --
Solomon, Gustave --
Solvable group --
Soma cube --
Somayaji, Nilakantha --
Somer-Lucas pseudoprime --
Sophie Germain prime --
Sort algorithm --
Soundness --
Soundness theorem --
Space-filling curve --
Space-like --
Space syntax --
Spacetime --
Special linear group --
Special orthogonal group --
Special unitary group --
Specificity --
Spectral method --
Spectral theorem --
Spectral width --
Spectrum of a ring --
Speed --
Sperner, Emmanuel --
Sphere --
Sphere packing --
Spherical coordinate system --
Spherical geometry --
Spherical harmonic --
Spheroid --
Spin network --
Spinor --
Spinor bundle --
Spiral --
Michael Spivak --
Splay tree --
Spline Talk:Spline --
Splitting field --
Splitting lemma --
Spontaneous symmetry breaking --
Sporus of Nicaea --
Sprague-Grundy theorem --
Spreadsheet --
Sprouts game --
Square --
Square number --
Square root --
Square root of two --
Square-free --
Square-integrable --
Square wave --
Squaring the circle --
Squaring the square --
Squeeze theorem --
Stabilizer subgroup --
Stack --
Standard deviation --
Standard score --
Standardized moment --
Saks, Stanislaw --
Star-algebra --
Star height problem --
Stationary point --
Statistical ensemble --
Statistical estimation --
Statistical hypothesis testing --
Statistical independence --
Statistical inference --
Statistical model --
Statistical regularity --
Statistical theory --
Statistics --
Stefan, Jožef --
Stefan's task --
Steganography --
Steiner --
Steiner, Jakob --
Steiner surface --
Steiner system --
Steinhaus, Hugo --
Steinhaus polygon notation --
Stellation --
Steradian --
Stereographic projection --
Stereometry --
Stevin, Simon --
Stieltjes integral --
Stieltjes, Thomas Joannes --
Stifel, Michael --
Stimulus-response model --
Stirling, James --
Stirling number --
Stirling's approximation --
Stochastic --
Stochastic calculus --
Stochastic context-free grammar --
Stochastic matrix --
Stochastic process --
Stochastic programming --
Stokes, George Gabriel --
Stokes' theorem --
Stone's duality --
Stone-Weierstrass theorem --
Straightedge --
Stress-strain curve --
Strict function --
String --
String theory --
String rewriting system --
Strong cardinal --
Strong Frobenius pseudoprime --
Strong Lucas pseudoprime --
Strong nuclear force --
Strong pseudoprime --
Strongly inaccessible cardinal --
Structural induction --
Student's t-distribution --
Subclass --
Surface --
Subfield (mathematics) --
Subgroup --
Subjective expected utility --
Submatrix --
Subobject classifier --
Subring --
Subsequence --
Subset --
Subset sum problem --
Substitution ciphers --
Substitution matrix --
Substitution property of equality --
Substitution rule --
Substructural logic --
Subtraction --
Successor function --
Successor cardinal --
Successor ordinal --
Sufficiency (statistics) --
Sum --
Sum rule in differentiation --
Sum rule in integration --
Summarizing statistical data --
Super ellipse --
Superalgebra --
Supercompact cardinal --
Superconductivity --
Supergroup (physics) --
Super-Poulet number --
Superstring theory --
Superstrong cardinal --
Support Support --
Support vector machine --
Supremum --
Surface (physics) --
Surface area --
Surface integral --
Surface normal --
Surjective --
Surreal number --
Suslin hypothesis --
Suslin's problem --
Swan's theorem --
Sylow, Peter Ludwig Mejdell --
Sylow theorem --
Sylvester, James Joseph --
Symbolic logic --
Symmedian --
Symmedian point --
Symmetric difference --
Symmetric function --
Symmetric group --
Symmetric key algorithm --
Symmetric matrix --
Symmetric prime --
Symmetric property of equality --
Symmetric space --
Symmetric tensor --
Symmetry --
Symmetry group --
Symplectic group --
Symplectic matrix --
Symplectic space --
Symplectic topology --
Synchrotron function --
Synthetic geometry --
System of linear equations --
Szego, Gabor --
T1 space --
Table of derivatives --
Table of divisors --
Table of integrals --
Table of mathematical symbols --
Table of prime factors --
Tabu search --
Tait's conjecture --
Tally mark --
Tangent --
Tangent space --
Tangloids --
Taniyama, Yutaka --
Taniyama-Shimura theorem --
Tarjan, Robert --
Tarjan's off-line least common ancestor algorithm --
Tarski, Alfred --
Tarski's circle-squaring problem --
Tartaglia, Niccolo Fontana --
Tate, John --
Taylor, Brook --
Taylor series --
Taylor's theorem --
Tchebysheff's theorem --
Teichmuller, Oswald --
Tensor --
Tensor derivative --
Tensor algebra --
Tensor field --
Tensor product --
Tensor product of fields --
Tensor product of R-algebras --
Term --
Ternary --
Terquem, Olry --
Tessellarion --
Tesseract --
Tetrahedron --
Tetromino --
TeX --
Thales' theorem --
The Greeks --
The most remarkable formula in the world --
The Nine Chapters on the Mathematical Art --
The Unreasonable Effectiveness of Mathematics in the Natural Sciences --
Theodolite --
Theorem --
Theorem of Bolzano-Weierstrass --
Theorem of Heine-Borel --
Theorem of Lagrange --
Theorem-proving --
Theorema Egregium --
Theory of computation --
Theory of constraints --
Thermal history modelling --
Thirteen --
Thom --
Thom, Rene --
Thompson, John Griggs --
Three cottage problem --
Three forms of mathematical induction --
Thurston elliptization conjecture --
Thurston, William --
Thurston's conjecture --
Tietze extension theorem --
Tiling --
Time domain --
Time hierarchy theorem --
Time value of money --
Timeline of mathematics --
Tits, Jacques --
Todd, John Arthur --
Todhunter, Isaac --
Toeplitz matrix --
Tomonaga, Sin-Itiro --
Topological group --
Topological ring --
Topological space --
Topological vector space --
Topologist's sine curve --
Topology --
Topology glossary --
Topology of the universe --
Topos --
Topos theory, background and genesis --
Torque --
Torricelli, Evangelista --
Torsion --
Torsion subgroup --
Torus --
Totalisator --
Totally indescribable cardinal --
Total order --
Total preorder --
Totally real number field --
Touchard polynomial --
Tower of Hanoi --
Trace class --
Trace (matrix) --
Trace of a matrix --
Traceability matrix --
Tractricoid --
Trajectory --
Transcendence degree --
Transcendental function --
Transcendental number --
Transformation --
Transitive closure --
Transitive property of equality --
Transitivity --
Transfer function --
Transfinite induction --
Transfinite number --
Translation (geometry) --
Transport function --
Transpose --
Trapezoid --
Trapezium --
Traveling salesman problem --
Treap --
Tree (graph theory) --
Tree automaton --
Tree data structure --
Tree decomposition --
Tree rotation --
Tree search algorithm --
Triangle --
Triangle inequality --
Triangle wave --
Triangular number --
Triangulation --
Trichotomy --
Trigonometric function --
Trigonometric identity --
Trigonometric substitution --
Trigonometry --
Trivial --
Trivial topology --
Truncated cube --
Truncated icosahedron --
Truncated icosidodecahedron --
Truth table --
Tschirnhaus, Ehrenfried Walter von --
Tucker, Albert W --
Tukey, John --
Tuple calculus --
Turán graph --
Turán's theorem --
Turbulence --
Turing, Alan --
Turing complete --
Turing machine --
Turing machine simulator --
Turing tarpit --
Tutte, W. T --
Twin paradox --
Twin prime --
Twin prime conjecture --
Twistor --
Two's complement --
Twofish encryption algorithm --
Tychonoff, Andrey Nikolayevich --
Tychonoff separation axioms --
Tychonoff space --
Tychonoff's theorem --
Typical set --
Ulam spiral --
Ulam, Stanislaw Marcin --
Ultra --
Ultrafilter --
Ultrafilter lemma --
Ultrametric space --
Ultraproduct --
Umbral calculus --
Unary numeral system --
Unary operation --
Uncertainty Principle --
Uncorrelated --
Uncountable --
Unexpected hanging paradox --
Unicity distance --
Unicoherent --
Unification --
Uniform boundedness principle --
Uniform continuity --
Uniform convergence --
Uniform distribution --
Uniform norm --
Uniform space --
Uniform tessellation --
Uniformization theorem --
Uniformly continuous --
Unifying conjecture --
Union (set theory) --
Unique factorization domain --
Unique prime --
Unit interval --
Unit square --
Unit vector --
Unitary group --
Unitary matrix --
Unitary representation --
Universal algebra --
Universal enveloping algebra --
Universal gas equation --
Universal property --
Universal quantification --
Universe (mathematics) --
Unknot --
Unsigned Lah number --
Unsolved problems in mathematics --
Up to --
Upper bound --
Upper half plane --
Uqlidisi --
URISC --
Urysohn, Paul Samuilovich --
Urysohn's lemma --
Utility --S
T
U