## About Delta Symbol

Delta (E.g., uppercase symbol Δ, lowercase symbols δ or 𝛿; and Greek lowercase symbol δ) is the 4th letter of the Greek alphabet. In the whole system of Greek numerals, the Delta symbol has a value of 4. The Delta Symbol was initially derived from the Phoenician letter known as “daelta.” Those letters that come from delta consist of Cyrillic Д and Latin D letters. Historically, a river delta (initially known as the Nile River delta) is so named due to its shape which approximates the triangular uppercase delta letter.

## What does Delta Symbol (lowercase, Greek δ) denote?

In this section, you will learn more about Delta Symbol (lowercase, Greek) meanings. The Delta lowercase letter δ (or in handwritten 𝛿) may be used to denote the following:

- A variation in the state of a variable in calculus.
- The quality of a vertex (i.e., graph theory).
- A functional derivative in functional calculus.
- An auxiliary function right in calculus is used mainly to rigorously determine the continuity or limit of a given function.
- The Dirac delta function in math.
- The chemical change of nuclear magnetic resonance in chemistry.
- The relative electronegativity of various atoms in a molecule, i.e., δ − is being more electronegative rather than δ+.
- The Kronecker delta in math.
- The change function in automata.
- Deflection in engineering mechanics.
- The force of interest usually in actuarial science.
- Text requiring deletion usually in proofreading; the usage is viewed to date back as far as to classical times.
- The declination of an element in astronomy, mainly in the equatorial coordinate system.

- The dividend yield in the Black–Scholes option pricing formula.
- In some of the manuscripts which are written by Dr. John Dee, where the character of the delta symbol is used to resemble Dee.
- A subunit of the F1 sector of the F- ATPase.
- The rate of depreciation of the aggregate capital stock of an economy usually in a growth model in macroeconomics.
- Ratios of environmental isotopes. For example, 18O/16O and D/1H from water are shows by using the delta symbol as a notation – δ18O and δD.
- The maximum birefringence of a crystal in optical mineralogy.
- In a system that exhibits electrical reactance, or the angle between current and voltage.
- Partial charge in chemistry.
- An Old Irish voiced dental or even an alveolar fricative of uncertain articulation, e.g., the ancestor of the sound presented by Modern Irish DH.

## What are computer encodings for Delta Symbol (lowercase, Greek)?

There are various codes to determine the lowercase Greek Delta Symbol which is depicted as a δ symbol. In this section, you will learn more on how to insert or type the Delta Symbol, particularly lowercase Greek δ delta on a computer. In order to get your preferred symbol, you should follow these instructions and type the code accordingly:

- Unicode – decimal 948; hex U+03B4.
- UTF-8 – decimal 206 180; hex CE B4.
- Numeric character reference – decimal δ hex δ
- Named character reference – decimal and hex both use δ
- DOS Greek – decimal 155; hex 9B;
- DOS Greek-2 – decimal 221; hex DD;
- Windows 1253 – decimal 228; hex E4;
- TeX – decimal, and hex both use \delta.