Mathematics
Articles about numbers, structures, logic and mathematical concepts.
Sign (mathematics)
Signed number representations
Significant figures
Significant figures (significant digits)
Similarity
Similarity (mathematics, computing, and general usage)
Similarity (geometry)
Simplex
Simplex (n-dimensional simplex)
An n-simplex is the simplest convex polytope in n dimensions: the convex hull of n+1 affinely independent points. It is fundamental in geometry, topology, numerical methods and com
Simply connected space
Simply connected space (topology)
Simpson's paradox
Sine wave
Sine wave (sinusoid): definition, properties, and applications
Size
Skew lines
Soap bubble
Soap bubble: structure, colours, behaviour and cultural meaning
Sobolev space
Sobolev space — function spaces for weak derivatives
Solid geometry
Solid geometry: study of three-dimensional shapes and measures
Sophie Germain prime
Sorting algorithm
Spache Readability Formula
Spearman's rank correlation coefficient
Spectrum of a ring
Sphere
Sphere packing
Sphere packing (geometry and applications)
Spherical coordinate system
Spiral
Spiral Curves: Definition, Types, Mathematical Properties and Applications
Square
Square (plane geometry)
Square (algebra)
Square (algebra): definition, properties, and uses
Square (cipher)
Square (block cipher)
Square foot
Square foot (unit of area)
Square kilometre
Square kilometre (km²)
Square mile
Square mile (unit of area)
Square number
Square number (perfect square)
Square root
The square root of a number is a value that, when squared, yields the original number. This article explains definitions, notation, real and complex roots, computation methods, and
Square root of 2
Square yard
Square yard (yd²): definition, conversions, history and usage
Standard deviation
Standard deviation (measure of dispersion)
Standard error
Standard error: meaning, calculation, and applications
Statistical parameter
Statistical significance
Statistical survey
Statistician
Statistics
Statistics: the mathematical study of collecting and interpreting data
Steradian
Steradian: the SI unit of solid angle
Stereographic projection
Stigma (letter)
Stigma (Greek letter and numeral)
Stochastic process
Stochastic process: concepts, types, and applications
Straight
Straight: geometric concept, optics, language, and common usages
Straightedge and compass construction
Stream cipher
String
String: material object, technical concept, and cultural term