Greek Small Letter Sigma (σ) – Meaning, Uses, and Examples

Discover the meaning, uses, and examples of the Greek Small Letter Sigma (σ). Learn how and where to use this symbol effectively.

Attribute	Value
HTML Entity	σ

Relation Symbols

ς Greek small letter final sigma

ͻ Greek reversed lunate sigma symbol

Ͻ Greek capital reversed lunate sigma symbol

∑ N-ary summation

⅀ Double-struck N-ary summation

ϛ Greek small letter stigma

Ϛ Greek capital letter stigma

𝚺 Mathematical bold capital sigma

𝛔 Mathematical bold small sigma

𝜮 Mathematical italic capital sigma

𝝈 Mathematical italic small sigma

𝞢 Mathematical bold italic capital sigma

𝞼 Mathematical bold italic small sigma

Σx Sum of x

Σ(x) Sum of function x

Σᵢ Sigma with subscript i

Σⁿ Sigma with superscript n

∑∑ Double summation

∑∑∑ Triple summation

σ² Sigma squared variance

σx Standard deviation of x

Σf(x)Δx Riemann sum

Σ→∫ Summation approaches integral

∑ Summation

𝚺 Capital Letter Sigma

𝛔 Small Letter Sigma

𝞢 Mathematical Sans-Serif Capital Sigma

𝞨 Mathematical Sans-Serif Bold Capital Sigma

𝞼 Mathematical Sans-Serif Small Sigma

Ϻ Greek Capital Letter Sigma

Ꜭ Latin Letter Small Sigma

Ȿ Latin Capital Sigma

σ Greek Small Letter Sigma

Ⓢ Circled Uppercase Sigma

ⓢ Circled Lowercase Sigma

𝗦 Bold Uppercase Sigma

𝘀 Bold Lowercase Sigma

𝚺 Double-Struck Capital Sigma

𝚼 Double-Struck Lowercase Sigma

𝕾 Bold Fraktur Capital Sigma

𝔖 Mathematical Fraktur Capital Sigma

ₛ Subscript Sigma

ˢ Superscript Sigma

𝒮 Sigma-algebra

𝓢 Cursive Sigma

Σ(x) Sigma Function

σ-bond Sigma Bond

σ′ Sigma Prime

∑≈ Sigma Approximation

⨑ Summation Symbol

𝞭 Sigma Completion

σ→ Sigma Substitution

lim Σ Sigma Limit

∫Σ Sigma Integral

Σn Sigma Notation

∮Σ Integral over Sigma

𝛛Σ Partial Sigma

ⵒ Inverted Summation

𝓕(Σ) Sigma Field

ℓΣ Sigma Form

∑= Sigma Calculation

𝜮⃗ Vector Sigma

⨖ Capital Sigma Dotted

σ✚ Lowercase Sigma Crossed

⟶Σ Sigma Transition

Σ− Sigma Minus

Σ+ Sigma Plus

σ⋅ Sigma Dot

σ• Sigma Bullet

σ| Sigma Bar

Σ/ Sigma Slash

σ⊂ Sigma Subset

Σ⊃ Sigma Superset

σ∈ Sigma Membership

ΣΔ Sigma Difference

𝒯(Σ) Sigma Topology

σₘₐₜ Sigma Matrix

σ̃ Sigma Wave

σΓ Sigma Gamma

ΣΠ Sigma Pi

ΣΤ Sigma Tau

ΣΠ(x) Summation of Products

Σexp(x) Summation of Exponentials

Σκ Sigma Kappa

Σ(r,θ) Sigma Polar Coordinates

Σ^2 Sigma to the Power

σ(p) Sigma Prime Number

∫Σ(x) Sigma Calculus

Σgeom Sigma Geometry

Σ(T) Sigma Topology Equation

Σₛₑᵣ Sigma Series

Σₑₓₚ Sigma Series Expansion

Σₜᵢₘₑ Sigma Time Series

σ⋅p Sigma Point

σ∂ Sigma Boundary

Σ∬ Sigma Double Integral

ΣΔT Sigma Triangle

σ(x,y) Sigma Multivariate

Σₙ Sigma Closed Form

∮ΣP Sigma Closed Path

σ=const Sigma as a Constant

Σ(A) Sigma Analysis

Σop Sigma Operator

∮Σ(x) Sigma Path Integral

σ∠ Sigma Rotation