• s-Additive Sequence
• s-Cluster
• s-Run
• S-Signature
• Saalschützian
• Saalschütz's Theorem
• Saddle
• Saddle-Node Bifurcation
• Saddle Point (Fixed Point)
• Saddle Point (Function)
• Saddle Point (Game)
• Safarevich Conjecture
• Safe
• Sagitta
• Saint Andrew's Cross
• Saint Anthony's Cross
• Saint Petersburg Paradox
• Sal
• Salamin Formula
• Salem Constants
• Salesman Problem
• Salient Point
• Salinon
• Salmon's Theorem
• Saltus
• Sample Proportion
• Sample Space
• Sample Variance
• Sampling
• Sampling Function
• Sampling Theorem
• San Marco Fractal
• Sandwich Theorem
• Sard's Theorem
• Sarkovskii's Theorem
• Sárközy's Theorem
• Sarrus Linkage
• Sarrus Number
• SAS Theorem
• Satellite Knot
• Satisfiability Problem
• Sausage Conjecture
• Savitzky-Golay Filter
• Savoy Knot
• Scalar
• Scalar Curvature
• Scalar Field
• Scalar Function
• Scalar Potential
• Scalar Triple Product
• Scale
• Scale Factor
• Scalene Triangle
• Scaling
• Scattering Operator
• Scattering Theory
• Schaar's Identity
• Schanuel's Conjecture
• Schauder Fixed Point Theorem
• Scheme
• Schensted Correspondence
• Scherk's Minimal Surfaces
• Schiffler Point
• Schinzel Circle
• Schinzel's Hypothesis
• Schinzel's Theorem
• Schisma
• Schläfli Double Six
• Schläfli's Formula
• Schläfli Function
• Schläfli Integral
• Schläfli's Modular Form
• Schläfli Polynomial
• Schläfli Symbol
• Schlegel Graph
• Schlömilch's Function
• Schlömilch's Series
• Schmitt-Conway Biprism
• Schnirelmann Constant
• Schnirelmann Density
• Schnirelmann's Theorem
• Schoenemann's Theorem
• Scholz Conjecture
• Schönflies Symbol
• Schönflies Theorem
• Schoolgirl Problem
• Schoute Coaxal System
• Schoute's Theorem
• Schrage's Algorithm
• Schröder-Bernstein Theorem
• Schröder's Equation
• Schröder's Method
• Schröder Number
• Schroeder Stairs
• Schröter's Formula
• Schur Algebra
• Schur Functor
• Schur's Inequalities
• Schur's Lemma
• Schur Matrix
• Schur Multiplier
• Schur Number
• Schur's Problem
• Schur's Representation Lemma
• Schur's Theorem
• Schwarz's Inequality
• Schwarz-Pick Lemma
• Schwarz Reflection Principle
• Schwarz Triangle
• Schwarz's Triangle Problem
• Schwarzian Derivative
• Schwenk's Formula
• Scientific Notation
• Score Sequence
• Screw
• Screw Theorem
• Scruple
• Sea Horse Valley
• Searching
• Search Tree
• Seashell
• Secant
• Secant Line
• Secant Method
• Secant Number
• Sech
• Second
• Second Curvature
• Second Derivative Test
• Second Fundamental Tensor
• Section (Graph)
• Section (Pencil)
• Section (Tangent Bundle)
• Sectional Curvature
• Sector
• Sectorial Harmonic
• Secular Equation
• Seed
• Seed of Life
• Seek Time
• Segment
• Segmented Number
• Segner's Recurrence Formula
• Segre's Theorem
• Seiberg-Witten Equations
• Seiberg-Witten Invariants
• Seidel-Entringer-Arnold Triangle
• Seifert Circle
• Seifert Conjecture
• Seifert Form
• Seifert Matrix
• Seifert's Spherical Spiral
• Seifert Surface
• Self-Adjoint Matrix
• Self-Adjoint Operator
• Self-Avoiding Walk
• Self-Conjugate Subgroup
• Self-Descriptive Number
• Self-Homologous Point
• Self Number
• Self-Reciprocating Property
• Self-Recursion
• Self-Similarity
• Self-Transversality Theorem
• Selfridge's Conjecture
• Selfridge-Hurwitz Residue
• Selmer Group
• Semi-Integral
• Semialgebraic Number
• Semianalytic
• Semicircle
• Semicolon Derivative
• Semiconvergent Series
• Semicubical Parabola
• Semiderivative
• Semidirect Product
• Semiflow
• Semigroup
• Semilatus Rectum
• Semimagic Square
• Semimajor Axis
• Semiminor Axis
• Semiperfect Magic Cube
• Semiperfect Number
• Semiperimeter
• Semiprime
• Semiprime Ring
• Semiregular Polyhedron
• Semiring
• Semisecant
• Semisimple
• Semisimple Algebra
• Semisimple Lie Group
• Semisimple Ring
• Semistable
• Sensitivity
• Sentence
• Separating Edge
• Separating Family
• Separation
• Separation of Variables
• Separation Theorem
• Separatrix
• Septendecillion
• Septillion
• Sequence
• Sequency
• Sequency Function
• Sequential Graph
• Series
• Series Expansion
• Series Inversion
• Series Multisection
• Series Reversion
• Serpentine Curve
• Serret-Frenet Formulas
• Set
• Set Difference
• Set Partition
• Set Theory
• Sexagesimal
• Sexdecillion
• Sextic Equation
• Sextic Surface
• Sextillion
• Sexy Primes
• Seydewitz's Theorem
• Sgn
• Shadow
• Shadowing Theorem
• Shafarevich Conjecture
• Shah Function
• Shah-Wilson Constant
• Shallit Constant
• Shallow Diagonal
• Shanks' Algorithm
• Shanks' Conjecture
• Shannon Entropy
• Shannon Sampling Theorem
• Shape Operator
• Shapiro's Cyclic Sum Constant
• Sharing Problem
• Sharkovsky's Theorem
• Sharpe's Differential Equation
• Sharpe Ratio
• Sheaf (Geometry)
• Sheaf (Topology)
• Shear
• Shear Matrix
• Shephard's Problem
• Sheppard's Correction
• Sherman-Morrison Formula
• Shi
• Shift
• Shift Property
• Shimura-Taniyama Conjecture
• Shimura-Taniyama-Weil Conjecture
• Shoe Surface
• Shoemaker's Knife
• Shortening
• Shuffle
• Siamese Dodecahedron
• Siamese Method
• Sibling
• Sicherman Dice
• Sici Spiral
• Side
• Sidon Sequence
• Siegel Disk Fractal
• Siegel Modular Function
• Siegel's Paradox
• Siegel's Theorem
• Sierpinski Arrowhead Curve
• Sierpinski Carpet
• Sierpinski's Composite Number Theorem
• Sierpinski Constant
• Sierpinski Curve
• Sierpinski Gasket
• Sierpinski-Menger Sponge
• Sierpinski Number of the First Kind
• Sierpinski Number of the Second Kind
• Sierpinski's Prime Sequence Theorem
• Sierpinski Sieve
• Sierpinski Sponge
• Sierpinski Tetrahedron
• Sierpinski's Theorem
• Sierpinski Triangle
• Sieve
• Sieve of Eratosthenes
• Sievert Integral
• Sievert's Surface
• Sifting Property
• Sigma Algebra
• Sigma Function
• Sigmoid Curve
• Sigmoid Function
• Sign
• Signalizer Functor Theorem
• Signature (Knot)
• Signature (Quadratic Form)
• Signature (Recurrence Relation)
• Signature Sequence
• Signed Deviation
• Significance
• Significance Test
• Significant Digits
• Significant Figures
• Signpost
• Signum
• Silver Constant
• Silver Mean
• Silver Ratio
• Silverman Constant
• Silverman's Sequence
• Similar
• Similarity Axis
• Similarity Dimension
• Similarity Point
• Similarity Transformation
• Similitude Center
• Similitude Ratio
• Simple Algebra
• Simple Continued Fraction
• Simple Curve
• Simple Graph
• Simple Group
• Simple Harmonic Motion
• Simple Harmonic Motion Quadratic Perturbation
• Simple Harmonic Oscillator
• Simple Interest
• Simple Polygon
• Simple Ring
• Simplex
• Simplex Method
• Simplicial Complex
• Simplicial Homology
• Simplicity
• Simply Connected
• Simpson's Paradox
• Simpson's Rule
• Simpson's 3/8 Rule
• Simson Line
• Sinc Function
• Sinclair's Soap Film Problem
• Sine
• Sine-Gordon Equation
• Sine Integral
• Sine-Tangent Theorem
• Sines Law
• Singly Even Number
• Singular Homology
• Singular Point (Algebraic Curve)
• Singular Point (Differential Equation)
• Singular Point (Function)
• Singular Series
• Singular System
• Singular Value
• Singular Value Decomposition
• Singularity
• Sinh
• Sink (Directed Graph)
• Sink (Map)
• Sinusoidal Projection
• Sinusoidal Spiral
• Sinusoidal Spiral Inverse Curve
• Sinusoidal Spiral Pedal Curve
• Sister Celine's Method
• Site Percolation
• Siteswap
• Six-Color Theorem
• Skein Relationship
• Skeleton
• Skeleton Division
• Skew Conic
• Skew Field
• Skew Lines
• Skew Polyomino
• Skew Quadrilateral
• Skew Symmetric Matrix
• Skewes Number
• Skewness
• Sklar's Theorem
• Skolem-Mahler-Lerch Theorem
• Skolem Paradox
• Skolem Sequence
• Slant Height
• Slice Knot
• Slide Move
• Slide Rule
• Slightly Defective Number
• Slightly Excessive Number
• Slip Knot
• Slope
• Slothouber-Graatsma Puzzle
• Slutzky-Yule Effect
• Sluze Pearls
• Smale-Hirsch Theorem
• Smale Horseshoe Map
• Small Cubicuboctahedron
• Small Ditrigonal Dodecacronic Hexecontahedron
• Small Ditrigonal Dodecicosidodecahedron
• Small Ditrigonal Icosidodecahedron
• Small Dodecacronic Hexecontahedron
• Small Dodecahemicosacron
• Small Dodecahemicosahedron
• Small Dodecahemidodecacron
• Small Dodecahemidodecahedron
• Small Dodecicosacron
• Small Dodecicosahedron
• Small Dodecicosidodecahedron
• Small Hexacronic Icositetrahedron
• Small Hexagonal Hexecontahedron
• Small Hexagrammic Hexecontahedron
• Small Icosacronic Hexecontahedron
• Small Icosicosidodecahedron
• Small Icosihemidodecacron
• Small Icosihemidodecahedron
• Small Inverted Retrosnub Icosicosidodecahedron
• Small Multiple Method
• Small Number
• Small Retrosnub Icosicosidodecahedron
• Small Rhombicosidodecahedron
• Small Rhombicuboctahedron
• Small Rhombidodecacron
• Small Rhombidodecahedron
• Small Rhombihexacron
• Small Rhombihexahedron
• Small Snub Icosicosidodecahedron
• Small Stellapentakis Dodecahedron
• Small Stellated Dodecahedron
• Small Stellated Triacontahedron
• Small Stellated Truncated Dodecahedron
• Small Triakis Octahedron
• Small Triambic Icosahedron
• Small World Problem
• Smarandache Ceil Function
• Smarandache Constants
• Smarandache Function
• Smarandache-Kurepa Function
• Smarandache Near-to-Primorial Function
• Smarandache Paradox
• Smarandache Sequences
• Smarandache-Wagstaff Function
• Smith Brothers
• Smith Conjecture
• Smith's Markov Process Theorem
• Smith's Network Theorem
• Smith Normal Form
• Smith Number
• Smooth Manifold
• Smooth Number
• Smooth Surface
• Snake
• Snake Eyes
• Snake Oil Method
• Snake Polyiamond
• Snedecor's F-Distribution
• Snellius-Pothenot Problem
• Snowflake
• Snub Cube
• Snub Cuboctahedron
• Snub Disphenoid
• Snub Dodecadodecahedron
• Snub Dodecahedron
• Snub Icosidodecadodecahedron
• Snub Icosidodecahedron
• Snub Polyhedron
• Snub Square Antiprism
• Soap Bubble
• Soccer Ball
• Sociable Numbers
• Social Choice Theory
• Socrates' Paradox
• Soddy Circles
• Soddy's Hexlet
• Soddy Line
• Soddy Points
• Sofa Constant
• Sol Geometry
• Soldner's Constant
• Solenoidal Field
• Solid
• Solid Angle
• Solid Geometry
• Solid Partition
• Solid of Revolution
• Solidus
• Solitary Number
• Soliton
• Solomon's Seal Knot
• Solomon's Seal Lines
• Solomon's Seal Polygon
• Solvable Congruence
• Solvable Group
• Solvable Lie Group
• Soma Cube
• Somer-Lucas Pseudoprime
• Sommerfeld's Formula
• Somos Sequence
• Sondat's Theorem
• Sonine's Integral
• Sonine Polynomial
• Sonine-Schafheitlin Formula
• Sophie Germain Prime
• Sorites Paradox
• Sort-Then-Add Sequence
• Sorting
• Source
• Sous-Double
• Souslin's Hypothesis
• Souslin Set
• Sous-Triple
• Space
• Space of Closed Paths
• Space Conic
• Space Curve
• Space Diagonal
• Space Distance
• Space Division
• Space-Filling Curve
• Space-Filling Function
• Space-Filling Polyhedron
• Space Groups
• Span (Geometry)
• Span (Link)
• Span (Polynomial)
• Span (Set)
• Span (Vectors)
• Sparse Matrix
• Spearman Rank Correlation Coefficient
• Special Curve
• Special Function
• Special Linear Group
• Special Matrix
• Special Orthogonal Group
• Special Point
• Special Series Theorem
• Special Unitary Group
• Species
• Specificity
• Spectral Norm
• Spectral Power Density
• Spectral Radius
• Spectral Rigidity
• Spectral Theorem
• Spectrum (Operator)
• Spectrum Sequence
• Speed
• Spence's Function
• Spence's Integral
• Spencer's 15-Point Moving Average
• Sperner's Theorem
• Sphenocorona
• Sphenoid
• Sphenomegacorona
• Sphere
• Sphere-Cylinder Intersection
• Sphere Embedding
• Sphere Eversion
• Sphere Geodesic
• Sphere Packing
• Sphere Point Picking
• Sphere-Sphere Intersection
• Sphere with Tunnel
• Spherical Bessel Differential Equation
• Spherical Bessel Function
• Spherical Bessel Function of the First Kind
• Spherical Bessel Function of the Second Kind
• Spherical Bessel Function of the Third Kind
• Spherical Cap
• Spherical Coordinates
• Spherical Design
• Spherical Excess
• Spherical Frustum
• Spherical Geometry
• Spherical Hankel Function of the First Kind
• Spherical Hankel Function of the Second Kind
• Spherical Harmonic
• Spherical Harmonic Addition Theorem
• Spherical Harmonic Closure Relations
• Spherical Harmonic Tensor
• Spherical Helix
• Spherical Point System
• Spherical Polygon
• Spherical Ring
• Spherical Sector
• Spherical Segment
• Spherical Shell
• Spherical Spiral
• Spherical Symmetry
• Spherical Tessellation
• Spherical Triangle
• Spherical Trigonometry
• Spherical Vector Harmonic
• Spheroid
• Spheroidal Harmonic
• Spheroidal Wavefunction
• Sphinx
• Spider and Fly Problem
• Spider Lines
• Spiegeldrieck
• Spieker Center
• Spieker Circle
• Spigot Algorithm
• Spijker's Lemma
• Spindle Cyclide
• Spindle Torus
• Spinode
• Spinor
• Spira Mirabilis
• Spiral
• Spiral Point
• Spiric Section
• Spirograph
• Spirolateral
• Spline
• Splitting
• Splitting Algorithm
• Sponge
• Sporadic Group
• Sports
• Sprague-Grundy Function
• Sprague-Grundy Number
• Sprague-Grundy Value
• Spread (Link)
• Spread (Tree)
• Spun Knot
• Squarable
• Square
• Square Bracket Polynomial
• Square Cupola
• Square Curve
• Square Cutting
• Square-Free
• Square Gyrobicupola
• Square Integrable
• Square Knot
• Square Matrix
• Square Number
• Square Orthobicupola
• Square Packing
• Square Polyomino
• Square Pyramid
• Square Pyramidal Number
• Square Quadrants
• Square Root
• Square Root Inequality
• Square Root Method
• Square Triangular Number
• Square Wave
• Squared
• Squared Square
• Squarefree
• Squareful
• Squaring
• Squeezing Theorem
• SSS Theorem
• Stability
• Stability Matrix
• Stabilization
• Stable Equivalence
• Stable Improper Node
• Stable Node
• Stable Spiral Point
• Stable Star
• Stable Type
• Stack
• Stäckel Determinant
• Stamp Folding
• Standard Deviation
• Standard Error
• Standard Map
• Standard Normal Distribution
• Standard Space
• Standard Tori
• Standardized Moment
• Standardized Score
• Stanley's Theorem
• Star
• Star of David
• Star Figure
• Star (Fixed Point)
• Star Fractal
• Star of Goliath
• Star Graph
• Star of Lakshmi
• Star Number
• Star Polygon
• Star Polyhedron
• Starr Rose
• State Space
• Stationary Point
• Stationary Tangent
• Stationary Value
• Statistic
• Statistical Test
• Statistics
• Staudt-Clausen Theorem
• Steenrod Algebra
• Steenrod-Eilenberg Axioms
• Steenrod's Realization Problem
• Steepest Descent Method
• Steffenson's Formula
• Steffensen's Inequality
• Steinbach Screw
• Steiner Chain
• Steiner Construction
• Steiner's Ellipse
• Steiner's Hypocycloid
• Steiner-Lehmus Theorem
• Steiner Points
• Steiner's Porism
• Steiner's Problem
• Steiner Quadruple System
• Steiner's Segment Problem
• Steiner Set
• Steiner Surface
• Steiner System
• Steiner's Theorem
• Steiner Triple System
• Steinerian Curve
• Steinhaus-Moser Notation
• Steinitz's Theorem
• Steinmetz Solid
• Stella Octangula
• Stella Octangula Number
• Stellated Polyhedron
• Stellated Tetrahedron
• Stellated Truncated Hexahedron
• Stellation
• Stem-and-Leaf Diagram
• Step
• Step Function
• Step Polynomial
• Steradian
• Stereogram
• Stereographic Projection
• Stereology
• Stern-Brocot Tree
• Stevedore's Knot
• Stewart's Theorem
• Stick Number
• Stickelberger Relation
• Stiefel Manifold
• Stiefel-Whitney Class
• Stiefel-Whitney Number
• Stieltjes Constants
• Stieltjes Integral
• Stieltjes' Theorem
• Stieltjes-Wigert Polynomial
• Stirling's Approximation
• Stirling Cycle Number
• Stirling's Finite Difference Formula
• Stirling's Formula
• Stirling Number of the First Kind
• Stirling Number of the Second Kind
• Stirling's Series
• Stirling Set Number
• Stirrup Curve
• Stochastic
• Stochastic Calculus of Variations
• Stochastic Group
• Stochastic Matrix
• Stochastic Process
• Stochastic Resonance
• Stöhr Sequence
• Stokes Phenomenon
• Stokes' Theorem
• Stolarsky Array
• Stolarsky-Harborth Constant
• Stolarsky's Inequality
• Stomachion
• Stone Space
• Stone-von Neumann Theorem
• Stopper Knot
• Størmer Number
• Straight Angle
• Straight Line
• Straight Polyomino
• Straightedge
• Strange Attractor
• Strange Loop
• Strangers
• Strassen Formulas
• Strassman's Theorem
• Strassnitzky's Formula
• Strategy
• Stratified Manifold
• Strehl Identity
• Striction Curve
• String Rewriting
• Strip
• Strong Convergence
• Strong Elliptic Pseudoprime
• Strong Frobenius Pseudoprime
• Strong Law of Large Numbers
• Strong Law of Small Numbers
• Strong Lucas Pseudoprime
• Strong Pseudoprime
• Strong Pseudoprime Test
• Strong Subadditivity Inequality
• Strong Triangle Inequality
• Strongly Connected Component
• Strongly Embedded Theorem
• Strongly Independent
• Strongly Triple-Free Set
• Strophoid
• Structurally Stable
• Structure
• Structure Constant
• Structure Factor
• Struve Differential Equation
• Struve Function
• Student's t-Distribution
• Student's z-Distribution
• Study's Theorem
• Sturm Chain
• Sturm Function
• Sturm-Liouville Equation
• Sturm-Liouville Theory
• Sturm Theorem
• Sturmian Separation Theorem
• Sturmian Sequence
• Subalgebra
• Subanalytic
• Subfactorial
• Subfield
• Subgraph
• Subgroup
• Sublime Number
• Submanifold
• Submatrix
• Subnormal
• Subordinate Norm
• Subscript
• Subsequence
• Subset
• Subspace
• Substitution Group
• Substitution Map
• Subtend
• Subtraction
• Succeeds
• Successes
• Sufficient
• Suitable Number
• Sum
• Sum-Product Number
• Sum Rule
• Summand
• Summatory Function
• Sup
• Super-3 Number
• Super Catalan Number
• Super-Poulet Number
• Superabundant Number
• Superegg
• Superellipse
• Superfactorial
• Supergraph
• Supernormal
• Superperfect Number
• Superposition Principle
• Superregular Graph
• Superscript
• Superset
• Supplementary Angle
• Support
• Support Function
• Supremum
• Supremum Limit
• Surd
• Surface
• Surface Area
• Surface Integral
• Surface Parameterization
• Surface of Revolution
• Surface of Section
• Surgery
• Surjection
• Surjective
• Surprise Examination Paradox
• Surreal Number
• Surrogate
• Surveying Problems
• Survivorship Curve
• Suslin's Theorem
• Suspended Knot
• Suspension
• Suzanne Set
• Suzuki Group
• Swallowtail Catastrophe
• Swastika
• Swastika Curve
• Sweep Signal
• Swinnerton-Dyer Conjecture
• Swinnerton-Dyer Polynomial
• Swirl
• Sylow p-Subgroup
• Sylow Theorems
• Sylvester Cyclotomic Number
• Sylvester's Determinant Identity
• Sylvester's Four-Point Problem
• Sylvester Graph
• Sylvester's Inertia Law
• Sylvester's Line Problem
• Sylvester Matrix
• Sylvester's Sequence
• Sylvester's Signature
• Sylvester's Triangle Problem
• Symbolic Logic
• Symmedian Line
• Symmedian Point
• Symmetric
• Symmetric Block Design
• Symmetric Design
• Symmetric Function
• Symmetric Group
• Symmetric Matrix
• Symmetric Points
• Symmetric Relation
• Symmetric Tensor
• Symmetroid
• Symmetry
• Symmetry Group
• Symmetry Operation
• Symmetry Principle
• Symplectic Diffeomorphism
• Symplectic Form
• Symplectic Group
• Symplectic Manifold
• Symplectic Map
• Symplectomorphism
• Synclastic
• Synergetics
• Synthesized Beam
• Syntonic Comma
• Syracuse Algorithm
• Syracuse Problem
• System of Differential Equations
• System of Equations
• Syzygies Problem
• Syzygy
• Szilassi Polyhedron
• Szpiro's Conjecture

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© 1996-9 Eric W. Weisstein
1999-05-26