gamma

This article covers " Γ ", the third letter of the Greek alphabet, for the meanings of the written word "Gamma" see under Gamma (disambiguation)

gamma
pronunciation
antique	[ g ] ​​
modern	[ ɣ, j ] ​​
Equivalents
Latin	G
Cyrillic	Г
Hebrew	ג
Arabic	ج
Phoenician	?
transcription
From the ancient world	G
From the modern	g (see  naming convention )
Coding Capitals Unicode number U + 0393 Unicode name GREEK CAPITAL LETTER GAMMA HTML & # 915; HTML entity Γ Minuscule Unicode number U + 03B3 Unicode name GREEK SMALL LETTER GAMMA HTML & # 947; HTML entity γ

The Gamma ( Greek neuter γάμμα , Majuskel Γ, minuscule γ) is the third letter of the Greek alphabet and has after the Milesian system the numerical value of 3.

use

• In physics:
  • γ is the symbol of the photon . In a narrower sense, it only refers to the photons of very high energy ( gamma rays ) in technology.
  • γ denotes the Lorentz factor .
  • γ is also used as a symbol of the gyromagnetic ratio .
  • More rarely, γ is also used as a symbol for the gravitational constant .
  • In quantum field theory , the Dirac matrices are denoted by γ.
  • As a symbol for the weights , the ratio of weight to volume of a physical body.
  • In high energy physics, Γ denotes the decay width
  • In thermodynamics , γ often denotes the adiabatic exponent .

• In mathematics:
  • γ denotes the Euler-Mascheroni constant .
  • The Γ-function describes a function that can be understood as an extension of the factorial function to the complex number level. The following relationship exists for all natural numbers : ${\displaystyle n\in \mathbb {N} }$ ${\displaystyle \Gamma (n+1)=n!}$
  • In differential geometry , Γ denotes the Christoffel symbols .
  • In probability theory, the gamma distribution describes a distribution function.
  • In statistics, gamma (symbol:) is a measure of ordinal association that, like , or (tau a, tau b, tau c) is based on the couple concept. ${\displaystyle \gamma }$ ${\displaystyle \tau _{a}}$ ${\displaystyle \tau _{b}}$ ${\displaystyle \tau _{c}}$

• In computer science:
  • When displaying images using electronic devices or in image processing, an abbreviation for gamma correction . It is a matter of adapting or correcting the gradient of the grayscale values ​​(i.e. the middle values) between 100% black and 100% white. Or also: Correction and adaptation of the course of the mean color brightness, color values ​​or gradations (to the visual sensitivity of the eye).
  • In communications engineering, Γ denotes the SNR gap , which models the difference between theoretical and achievable channel capacity.
  • The symbol for the ribbon alphabet of a Turing machine

• As a unit:
  • Gamma ( unit symbol γ) is an obsolete unit of magnetic flux density since 1970 .
  • γ was used synonymously for micrograms until the beginning of the 20th century .

• Related to linguistics:
  • Letter used for transliterating a character in the Mongolian script .
  • In the International Phonetic Alphabet , the minuscule gamma ɣ is the symbol for the voiced velar fricative

• Further use:
  • In astronomy, the gamma value of a solar eclipse indicates how centrally the moon's shadow hits the earth.
  • In construction , γ often denotes a partial safety factor .
  • In plant physiology, Γ denotes the CO ₂ compensation point
  • In medicine , especially in anesthesia and intensive care medicine , γ is sometimes used as an alternative designation for one microgram per kilogram of body weight per minute, especially for the dosage of catecholamines .
  • In option theory , Γ denotes the second derivative of the option price after the price of the underlying asset.

See also

• gamma rays
• Gammazism
• Gamma correction
• Gamma distribution
• Gamma function
• Gamma-ray burst
• Gamma Spectroscopy
• Г (Cyrillic letter)

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