See list of mathematical topics for the purpose and extent of this list.

A-C - D-F - G-I - J-L - M-O - P-R - S-U - V-Z

S

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 --

T

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 --

U

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 --