Lambda

This article covers the letter. For further meanings see Lambda (disambiguation) .

Lambda
pronunciation
antique	[ l ] ​​
modern	[ l ] ​​
Equivalents
Latin	L.
Cyrillic	Л
Hebrew	ל
Arabic	ل
Phoenician	?
Armenian	Լ
transcription
From the ancient world	l
From the modern	l
Coding Capitals Unicode number U + 039B Unicode name GREEK CAPITAL LETTER LAMDA HTML & # 923; HTML entity ? Minuscule Unicode number U + 03BB Unicode name GREEK SMALL LETTER LAMDA HTML & # 955; HTML entity ?

The lambda (also Lamda , Lanta or Labda , Greek neuter Λάμδα ; uppercase Λ, minuscule λ) is the eleventh letter of the Greek alphabet and has the numerical value 30 according to the Milesian system .

use

• The lowercase letter λ is
  • In physics the symbol for the wavelength , the decay constant , the thermal conductivity or the mean free path
  • In electrical engineering, the term for the phase shift of the broadband signal
  • in compressed air technology, the volumetric efficiency of piston compressors . It is calculated from: Effective delivery quantity / theoretical suction volume. The volumetric efficiency is also called the degree of delivery in a simplified way and is a measure of the quality of reciprocating compressors. The degree of delivery depends on the pressure and is around 70% for 8 bar for good 1-stage piston compressors and around 80-85% for 2-stage systems.
  • In thermodynamics and all combustion (power) machines ( engines , gas turbines, etc.) the symbol for the combustion air ratio or excess air
  • in mechanics as a symbol for slenderness ; See also: buckling
  • the connecting rod ratio for crank drives . This is the quotient of the radius of the crankshaft by the length of the connecting rod . Depending on the arrangement and number of cylinders, λ is an important value for the oscillating forces and moments.
  • the symbol for the high speed speed of wind turbines
  • in mathematics the term for the Lebesgue measure
  • in analytical geometry often the parameter of straight lines or planes in the parametric form
  • in metallurgy the cooling parameters during heat treatment
  • in geography the symbol for the longitude
  • in microbiology the identifier for the bacteriophage λ
  • in technical model experiments the symbol for the scale
  • in computer science and mathematical logic the beginning of a term that defines an anonymous function, see lambda calculus
  • in theoretical computer science the output function of a finite automaton
  • in the gay and lesbian movement since the 1970s the symbol for libertas (lat. " freedom ") as equality and therefore part of the name and / or symbol of several organizations and events:
    • Gay Activists Alliance : Former US lesbian and gay civil rights movement, split from the first post-Stonewall organization, Gay Liberation Front (late 1969)
    • Lambda Legal : LGBT & HIV - US Civil Rights Organization (1971/1973)
    • Lambda youth network : National youth association for gays, lesbians, bisexuals and transgender people (1990)
    • Legal Committee Lambda (RKL): Lesbian-gay civil rights organization in Austria (1991)
  • In dams, the reduction of the sole water pressure under dams is built through sealing or drainage measures
  • in fluid dynamics the symbol for the pipe friction coefficient
  • in heat theory / technology the symbol for the coefficient of thermal conductivity
  • in microelectronics the channel length modulation factor of metal-oxide-semiconductor field effect transistors
  • in the Half-Life video game series, the game's logo and trademark.

• The capital letter Λ (not to be confused with the logic symbol ∧ ) is
  • In the theory of vibrations in classical physics, a measure of damping - logarithmic decrement
  • in elementary particle physics the name of a Λ-baryon
  • In quantum field theory, the name for the cut-off parameter in regularization
  • Albert Einstein's cosmological constant , with the help of which he wanted to ban the expansion of the universe from his formulas.
  • in mathematics the usual name for the Mangoldt function .
  • the coat of arms on the shields of the Spartan Hoplites (L for Lacedaemonians )
  • the logo of Lambda Physik , producer of (mainly) excimer lasers in Göttingen
  • in aircraft construction a measure of the wing extension
  • a Japanese type of rocket, Lambda (rocket)
  • a laser-based large format output device for high-resolution exposure of images on photosensitive roll materials from Durst AG
  • a Lancia car
  • a symbol of identitarian groups in Europe.

Examples

• λόγος , lógos (ancient Greek pronunciation): "speech", "word"
• Λαέρτης , Lāertēs (ancient Greek pronunciation)

See also

• V-lambda curve
• Lambda probe
• Lambdazism
• λ / 4 plate
• Lambda calculus
• Lambda CDM model

Web links

Wiktionary: Lambda  - explanations of meanings, word origins, synonyms, translations