Delta - Revision history

Beza 1598: /* References */

2016-03-09T04:33:12Z

References

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	{{Greek Lexicon}}		{{Greek Lexicon}}
	[[Category:Greek letters]]		[[Category:Greek letters]]

			{{Donate}}

Nick at 12:11, 21 January 2015

2015-01-21T12:11:51Z

← Older revision		Revision as of 12:11, 21 January 2015
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	[[Image:delta.jpg\|thumb\|150px\|~~Alpha~~]]		[[Image:delta.jpg\|thumb\|150px\|Delta]]

	'''Delta''' (uppercase '''Δ''', lowercase '''δ'''; δέλτα; Modern Greek ˈðelta ''dhélta'') is the fourth letter of the [[Greek alphabet]]. In the system of [[Greek numerals]] it has a value of 4. It was derived from the [[Phoenician alphabet\|Phoenician letter]] [[Dalet (letter)\|Dalet]]. Letters that come from delta include [[Latin alphabet\|Latin]] [[D]] and [[Cyrillic alphabet\|Cyrillic]] [[De (Cyrillic)\|Д]].		'''Delta''' (uppercase '''Δ''', lowercase '''δ'''; δέλτα; Modern Greek ˈðelta ''dhélta'') is the fourth letter of the [[Greek alphabet]]. In the system of [[Greek numerals]] it has a value of 4. It was derived from the [[Phoenician alphabet\|Phoenician letter]] [[Dalet (letter)\|Dalet]]. Letters that come from delta include [[Latin alphabet\|Latin]] [[D]] and [[Cyrillic alphabet\|Cyrillic]] [[De (Cyrillic)\|Д]].

Nick at 12:11, 21 January 2015

2015-01-21T12:11:20Z

← Older revision		Revision as of 12:11, 21 January 2015
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			[[Image:delta.jpg\|thumb\|150px\|Alpha]]

	'''Delta''' (uppercase '''Δ''', lowercase '''δ'''; δέλτα; Modern Greek ˈðelta ''dhélta'') is the fourth letter of the [[Greek alphabet]]. In the system of [[Greek numerals]] it has a value of 4. It was derived from the [[Phoenician alphabet\|Phoenician letter]] [[Dalet (letter)\|Dalet]]. Letters that come from delta include [[Latin alphabet\|Latin]] [[D]] and [[Cyrillic alphabet\|Cyrillic]] [[De (Cyrillic)\|Д]].		'''Delta''' (uppercase '''Δ''', lowercase '''δ'''; δέλτα; Modern Greek ˈðelta ''dhélta'') is the fourth letter of the [[Greek alphabet]]. In the system of [[Greek numerals]] it has a value of 4. It was derived from the [[Phoenician alphabet\|Phoenician letter]] [[Dalet (letter)\|Dalet]]. Letters that come from delta include [[Latin alphabet\|Latin]] [[D]] and [[Cyrillic alphabet\|Cyrillic]] [[De (Cyrillic)\|Д]].

Nick: /* References */

2015-01-20T11:37:35Z

References

← Older revision		Revision as of 11:37, 20 January 2015
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	* 4. [1][dead link]		* 4. [1][dead link]

	~~==References==~~		{{Greek Lexicon}}

	[[Category:Greek letters]]		[[Category:Greek letters]]

Nick: /* See also */

2011-03-01T13:10:30Z

Nick: /* See also */

2011-03-01T13:10:05Z

Nick: /* Upper case */

2011-03-01T13:09:03Z

Upper case

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	:[[image:a0b5af55760d4ae61ede0188931cbeca.png]]		:[[image:a0b5af55760d4ae61ede0188931cbeca.png]]
	*The [[discriminant]] of a [[polynomial]] equation, especially the [[quadratic equation]]:		*The [[discriminant]] of a [[polynomial]] equation, especially the [[quadratic equation]]:
	:~~<math>\Delta = b^2 - 4ac\,\!</math>~~		:[[image:3fc7983ab93ee0dbf8cd2394e9b70854.png]]
	*A [[derivative\|macroscopic change]] in the value of a variable in mathematics or science		*A [[derivative\|macroscopic change]] in the value of a variable in mathematics or science
	*[[Uncertainty]] in a physical variable as seen in for instance the [[uncertainty principle]]		*[[Uncertainty]] in a physical variable as seen in for instance the [[uncertainty principle]]

Nick: /* Upper case */

2011-03-01T13:08:15Z

Upper case

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	*[[Difference operator\|Change]]; e.g. in		*[[Difference operator\|Change]]; e.g. in
	::[[image:258380b09cfe5f0f1fe3dfaadd4eecdf.png]], the average change of y per unit x, i.e. the change of y over the change of x		::[[image:258380b09cfe5f0f1fe3dfaadd4eecdf.png]], the average change of y per unit x, i.e. the change of y over the change of x
	*More specifically, the [[difference operator]]<~~ref~~>~~http://ocw.mit.edu/high-school/courses/highlights-of-calculus/big-picture-of-calculus/~~</~~ref~~>.		*More specifically, the [[difference operator]]<sup>[]</sup>.
	*The [[Laplace operator]]:		*The [[Laplace operator]]:
	:~~<math>\Delta f = \sum_{i=1}^n {\frac{\partial^2 f}{\partial x_i^2}}</math>~~		:[[image:a0b5af55760d4ae61ede0188931cbeca.png]]
	*The [[discriminant]] of a [[polynomial]] equation, especially the [[quadratic equation]]:		*The [[discriminant]] of a [[polynomial]] equation, especially the [[quadratic equation]]:
	:<math>\Delta = b^2 - 4ac\,\!</math>		:<math>\Delta = b^2 - 4ac\,\!</math>

Nick: /* Upper case */

2011-03-01T13:07:02Z

Upper case

← Older revision		Revision as of 13:07, 1 March 2011
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	*[[Change (mathematics)\|Change]] any type; (in science and engineering fields)		*[[Change (mathematics)\|Change]] any type; (in science and engineering fields)
	*[[Difference operator\|Change]]; e.g. in		*[[Difference operator\|Change]]; e.g. in
	::~~<math>{y_2-y_1\over x_2-x_1} = {\Delta y \over \Delta x}</math>~~, the average change of y per unit x, i.e. the change of y over the change of x		::[[image:258380b09cfe5f0f1fe3dfaadd4eecdf.png]], the average change of y per unit x, i.e. the change of y over the change of x
	*More specifically, the [[difference operator]]<ref>http://ocw.mit.edu/high-school/courses/highlights-of-calculus/big-picture-of-calculus/</ref>.		*More specifically, the [[difference operator]]<ref>http://ocw.mit.edu/high-school/courses/highlights-of-calculus/big-picture-of-calculus/</ref>.
	*The [[Laplace operator]]:		*The [[Laplace operator]]:

Nick at 13:05, 1 March 2011

2011-03-01T13:05:22Z

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	* It is the symbol of the Greek inventor and architect [[Daedalus]]		* It is the symbol of the Greek inventor and architect [[Daedalus]]
	*In [[genetics]], it can stand for a [[Deletion (genetics)\|gene deletion]], e.g. the [[CCR5-Δ32]] a deletion of the CCR5 at the 32nd base pair segment		*In [[genetics]], it can stand for a [[Deletion (genetics)\|gene deletion]], e.g. the [[CCR5-Δ32]] a deletion of the CCR5 at the 32nd base pair segment
	*The [http://ada.org/ American Dental Association] cites it (together with omicron for "odont") as the symbol of dentistry.<~~ref~~>[~~http://ada.org/public/topics/emblem_dentistry.asp ADA.org: Oral Health Topics: Emblem/Insignia of Dentistry~~]~~{{dead link\|date=September 2010}}~~</~~ref~~>		*The [http://ada.org/ American Dental Association] cites it (together with omicron for "odont") as the symbol of dentistry.<sup>[]</sup>

	===Lower case===		===Lower case===
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	*Signifies a major seventh chord in jazz music notation.		*Signifies a major seventh chord in jazz music notation.
	*Ratios of [[environmental isotopes]], such as <sup>18</sup>O/<sup>16</sup>O and [[Deuterium\|D]]/<sup>1</sup>H from waters are displayed using [[Isotope geochemistry\|delta notation]] - δ<sup>18</sup>O and δD, respectively		*Ratios of [[environmental isotopes]], such as <sup>18</sup>O/<sup>16</sup>O and [[Deuterium\|D]]/<sup>1</sup>H from waters are displayed using [[Isotope geochemistry\|delta notation]] - δ<sup>18</sup>O and δD, respectively
	*The rate of depreciation of the aggregate capital stock of an economy in an [[exogenous growth model]] in [[macroeconomics]].<~~ref~~>[~~http://economics.mit.edu/kevinnguyen~~ ]~~{{dead link\|date=July 2010}}~~</~~ref~~>		*The rate of depreciation of the aggregate capital stock of an economy in an [[exogenous growth model]] in [[macroeconomics]].<sup>[]</sup>

	==See also==		==See also==

← Older revision		Revision as of 13:10, 1 March 2011
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	*[[Th (digraph)\|Th]]		*[[Th (digraph)\|Th]]
	*[[Greek letters used in mathematics, science, and engineering]]		*[[Greek letters used in mathematics, science, and engineering]]
	*[[Nabla symbol]] (~~<math>\nabla</math>~~)		*[[Nabla symbol]] ([[image:fe3a83e41074834731743ab803cd4936.png]])
	*[[∂]] - the [[partial derivative]] symbol, sometimes mistaken for a lowercase Greek letter Delta.		*[[∂]] - the [[partial derivative]] symbol, sometimes mistaken for a lowercase Greek letter Delta.

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	*[[Nabla symbol]] (<math>\nabla</math>)		*[[Nabla symbol]] (<math>\nabla</math>)
	*[[∂]] - the [[partial derivative]] symbol, sometimes mistaken for a lowercase Greek letter Delta.		*[[∂]] - the [[partial derivative]] symbol, sometimes mistaken for a lowercase Greek letter Delta.

			==References==

			* 1. http://ocw.mit.edu/high-school/courses/highlights-of-calculus/big-picture-of-calculus/
			* 2. ADA.org: Oral Health Topics: Emblem/Insignia of Dentistry[dead link]
			* 3. "Konglig Datasektionen, Statutes, §2.2 Symbol". D.kth.se. http://www.d.kth.se/sektionen/formalia/stadgar/#paragraf2.2. Retrieved 2010-09-07.
			* 4. [1][dead link]

	==References==		==References==

	[[Category:Greek letters]]		[[Category:Greek letters]]