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# Delta

Delta commonly refers to:

Delta may also refer to:

## Culture and society

### Education

• DELTA (ELT), a professional qualification in English language teaching
• Delta, a quadra group used in socionics

## Science and technology

### Computer science

• Delta (computer), a Russian ZX Spectrum clone
• Delta encoding, a technique in computer communications and version-control

### Mathematics

• (ε, δ)-definition of limit
• Delta (finance), a first order derivative of an option pricing formula versus the underlying spot price
• Delta method, a method for approximating the distribution of a function of a random variable
• Δ, or difference operator
• Δ, or modular discriminant
• Δ, or symmetric difference
• Δ, a change of state between two before and after state schemas in the Z notation
• $\Delta^0_n,$ a classification in the arithmetical hierarchy
• $\Delta^1_n,$ a classification in the analytical hierarchy
• $\Delta^P_i,$ a classification in the polynomial hierarchy
• $\nabla$, an inverted delta representing del, a vector differential operator
• Delta connective, a unary connective in t-norm fuzzy logics
• δij, the Kronecker delta function
• δ(xy), the Dirac delta function

### Medicine and biology

• Delta (genus), Old World genus of potter wasps
• Delta (ligand), an activator of the Notch signaling pathway
• DELTA (taxonomy), a data format used in taxonomy for recording descriptions of living things
• Delta wave, the frequency band of brain activity between 1 and 4 hertz

### Physics

• Delta baryon, a subatomic particle with spin 3/2
• High-leg delta, three phase electrical circuit

## People with the name

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### Look at other dictionaries:

• delta — delta …   Dictionnaire des rimes

• Delta IV — Medium Données générales Mission Lanceur Commercial Orbite LEO et GTO Période des lancements …   Wikipédia en Français

• Delta 2 — Delta II  Ne doit pas être confondu avec Delta 2. Une Delta II 7925 s’apprete à lancer la sonde De …   Wikipédia en Français

• Delta C — The first Delta C launches with Explorer 18 Function Expendable launch system Country of origin …   Wikipedia

• Delta D — Launch of a Delta D with Intelsat I Function Expendable launch system Country of origin …   Wikipedia

• Delta J — Launch of the Delta J with Explorer 38 Function Expendable launch system Country of origin   …   Wikipedia

• Delta M — Launch of the first Delta M with Intelsat 301 Function Expendable launch system Country of origin …   Wikipedia

• delta — [ dɛlta ] n. m. • delta du Nil XIIIe; de delta « lettre grecque » I ♦ Quatrième lettre de l alphabet grec (Δ, δ), correspondant au d. En forme de delta. ⇒ deltoïde, triangulaire. Aile (en) delta. ⇒ deltaplane. ♢ Adj. inv. Phys. Rayon delta :… …   Encyclopédie Universelle

• Delta A — launching Explorer 14 Function Expendable launch system Country of origin …   Wikipedia

• Delta B — prior to the launch of TIROS 8 Function Expendable launch system Country of origin …   Wikipedia