Lambda
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| Greek alphabet | |
|---|---|
| Α α Alpha | Β β Beta |
| Γ γ Gamma | Δ δ Delta |
| Ε ε Epsilon | Ζ ζ Zeta |
| Η η Eta | Θ θ Theta |
| Ι ι Iota | Κ κ Kappa |
| Λ λ Lambda | Μ μ Mu |
| Ν ν Nu | Ξ ξ Xi |
| Ο ο Omicron | Π π Pi |
| Ρ ρ Rho | Σ σ Sigma |
| Τ τ Tau | Υ υ Upsilon |
| Φ φ Phi | Χ χ Chi |
| Ψ ψ Psi | Ω ω Omega |
| obsolete letters | |
| [[Digamma|Template:Polytonic Digamma]] | [[San (letter)|Template:Polytonic San]] |
| [[Qoppa|Template:Polytonic Qoppa]] | [[Sampi|Template:Polytonic Sampi]] |
Lambda (upper case Λ, lower case λ) is the 11th letter of the Greek alphabet. In the system of Greek numerals it has a value of 30.
In art and photography, a lambda-print is a positive image, usually a photograph, executed on photographic (light-sensitive) paper using a dedicated laser printer (e. g. Océ LightJet), as opposed to a C-type or an inkjet print.
The upper-case letter Λ is used as a symbol for:
- The lambda particles in particle physics
- The set of logical axioms in the axiomatic method of logical deduction in first-order logic
- The cosmological constant
The lower-case letter λ is used as a symbol for:
- A unit of measure of volume (symbol λ) equal to one microlitre (1 μL) or one cubic millimetre (1 mm³)
- The wavelength of a wave in physics
- The radioactive decay constant
- The lambda phage virus in biology
- Eigenvalues in linear algebra
- Function expressions in lambda calculus and, by extension, some programming languages
- The language Unlambda is a functional programming language based upon combinatory logic, a simplification of the lambda calculus that does not involve the lambda at all, hence the un- prefix.
- Gay pride (explanations for this usage vary) and as a gay signifier, such as the Lambda Literary Award
- The Half-Life computer game
- Excess air ratio in an internal combustion engine
- A Japanese rocket type, Lambda (rocket)
- A shuttle type in Star Wars, Lambda Shuttle.
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