δ

Unicode name	GREEK SMALL LETTER DELTA
Codepoint	U+03B4
γ ← Greek and Coptic → ε

See also Appendix:Variations of "d"

Translingual

Symbol

δ

1. (mathematics) A small increment or change in a variable.

   $\delta$$x$is a small change in variable $x$

2. (mathematics, calculus of variations) Denotes a small — rather infinitesimal — variation of the value returned by a functional and/or of the functions on which that functional depends. This symbol can also — along a similar vein — be used to help denote virtual displacement and virtual work.
3. (mathematics) A small number, usually accompanied by ε.
   • For any $\epsilon>0$, there is a $\delta$$>0$ …

See also

• Δ on Wikipedia.Wikipedia

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Greek

Etymology

Derived from its majuscule counterpart Δ, from the Phoenician letter 𐤃, dalet.

Letter

δ (lowercase, uppercase Δ)

1. Lower case delta (δέλτα), the fourth letter of Greek alphabet. It represented in Ancient Greek a voiced dental plosive: IPA: /d/ and in modern Greek a voiced dental fricative: IPA: /ð/. It is preceded by γ and followed by ε.

Derived terms

• δ', ,δ
• d, D (Roman)
• д, Д (Cyrillic)
• ⲇ, Ⲇ (Coptic)
• ∂ (mathematics)

See also

• Greek script: Αα Ββ Γγ Δδ Εε Ζζ Ηη Θθ Ιι Κκ Λλ Μμ Νν Ξξ Οο Ππϖ Ρρ Σσς Ττ Υυ Φφ Χχ Ψψ Ωω