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| {{Redirect|Δ|the British indie rock quartet|Alt-J|use in mathematics|Delta (disambiguation)#Mathematics{{!}}Delta (disambiguation)}}
| | == '徐Pingqiuは微笑んで言った == |
| {{refimprove|date=February 2013}}
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| {{Wiktionary|Δ|δ}}
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| {{Greek Alphabet|letter=delta}}
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| '''Delta''' (uppercase Δ, lowercase δ or 𝛿; {{lang|el|Δέλτα}} ''Délta''; Modern Greek {{IPA-el|ˈðelta|}}) 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]] [[Image:phoenician daleth.png|20px]]. Letters that come from delta include [[Latin alphabet|Latin]] [[D]] and [[Cyrillic script|Cyrillic]] [[De (Cyrillic)|Д]]. | |
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| A [[river delta]] (originally, the [[Nile River]] delta) is so named because its shape approximates the upper-case letter delta (the shape is a triangle). {{cn|date=October 2013}}
| | 「私は、あなたは彼がSWATチームを置くことをさせることはできませんしたいのですが、古い仲間7旅団プレス、それの一端？殷Nanfeiは、王チョンの学生はすべての古い仲間の危険性を強調されている、あなたは、新しい圧力を完全に頭に髪を成長しなかった彼らは懸命に働くことを拒否。 [http://www.dmwai.com/webalizer/kate-spade-8.html マザーズバッグ ケイトスペード] '徐Pingqiu道。それでも集団的信用。渡す。<br>この新人が動作することを拒否し、それが残念ではないことを<br>'は、私はこの小さな仲間は本当に探偵だと思うと、奇妙なことには、鮮明な画像を平滑化するだけでなく、黄色、家の解放に触れた。これらの事はおろか見られている、あやふや感が。 [http://www.dmwai.com/webalizer/kate-spade-6.html ケイトスペード マザーズバッグ] '李Weiguoビットが本格驚い聞く。結局のところ、これらの手段のフィールドを理解することができないバックオフィスは、神秘的に見えるかもしれません。<br><br>'あなたはこのことを心配する必要はありません。'徐Pingqiuは微笑んで言った： [http://www.dmwai.com/webalizer/kate-spade-9.html ケイトスペード 財布 値段] '彼はただ、彼がチームをポケットの委譲に運ばれた私はあなたに伝えたい、働くことを拒否していたが、警察学校を卒業していなかった3例外的な監督称号を授与されましたあなたは確かにそうではないとは思わない？ [http://www.dmwai.com/webalizer/kate-spade-8.html ハンドバッグ ケイトスペード] '<br><br>「これが可能であるかを、ああ不可能？ [http://www.dmwai.com/webalizer/kate-spade-13.html ケイトスペード バッグ ショルダー] '李Weiguoは、ずっと言っ道路、徐Pingqiuを驚かせたクリップを保持し、引き出しを開け、手 |
| | 相关的主题文章： |
| | <ul> |
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| | <li>[http://www.avis.ne.jp/my-cgi/anpie_wforum.cgi http://www.avis.ne.jp/my-cgi/anpie_wforum.cgi]</li> |
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| | <li>[http://www.axiabridge.com/sunbbs/sunbbs.cgi http://www.axiabridge.com/sunbbs/sunbbs.cgi]</li> |
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| | <li>[http://top100test.zhongsou.net/ymqshopbbs/forum.php?mod=viewthread&tid=2838694 http://top100test.zhongsou.net/ymqshopbbs/forum.php?mod=viewthread&tid=2838694]</li> |
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| | </ul> |
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| ==Pronunciation and origin== | | == 「ああ、それはより激しいものになるだろう == |
| In [[Ancient Greek]], it represented a [[voiced dental plosive]] {{IPA|/d/}}. In [[Modern Greek]], it represents a [[voiced dental fricative]] {{IPA|/ð/}}, like the "th" in "that" or "this". It is [[romanization of Greek|romanized]] as ''d'' or ''dh''.<br>
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| The capital letter delta ('''Δ''', which has the convenient form of an [[isosceles triangle]]) is commonly used in subjects of science and mathematics, often to describe change, because delta is the initial letter of the Greek word διαφορά, ''diaphorá'', "difference" (the small [[Latin]] letter '''d''' is used in much the same way for the notation of [[derivative]]s and [[differential (mathematics)|differential]]s{{disambiguation needed|date=September 2013}}, which also describe change).
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| ==Upper case==
| | '<br>「ああ、それはより激しいものになるだろう [http://www.dmwai.com/webalizer/kate-spade-14.html kate spade マザーズバッグ]。」<br>プレスマウスをテーブルの上に置く小型の録音を、。<br><br>ジジの声の後、罪の外に渡すよりも多くの疑問を [http://www.dmwai.com/webalizer/kate-spade-15.html ケイトスペード クラッチバッグ]。<br><br>「ヤンあなたがたは、現在の状況を知りたいですか？そのオープンの店で、彼女はあなたが彼女を忘れないのだろうか？......彼女は死んだ、あなたのようようになった。 '<br><br>嘘Liangqianケースが「私は正直、あああなたに1つアドバイスを......私たちはクラスメートを見つけるために数ヶ月のためにあなたを探している、彼らは最終的に自分の位置を決定する？あなたをキャッチするために何千マイルに追いつくためとして、、ああ信じていないポイントによって影響を少なくし、殺人、犯罪について何かを説明します。 '<br><br>「なしなしなしなし......私に害を与えない、私は彼女を殺していない。 [http://www.dmwai.com/webalizer/kate-spade-0.html ハンドバッグ ケイトスペード] '<br><br>「いいえ、いいえ、それは本当に私ではなかった、私たちが分割されていないが、私は一度だけ彼女の家に行った、彼女の家を成功しました。 [http://www.dmwai.com/webalizer/kate-spade-14.html ケイトスペード時計人気] '<br><br>「本当に、私は彼女に少しの上司を見て、彼女がどのように少しのお金......私は殺してるの両方によって、数日の周りにハングアップしたいですか？ '<br><br>「ああ、ああ [http://www.dmwai.com/webalizer/kate-spade-3.html ケイトスペード 財布 新作]......私はああグレードのようなものを探して、低すぎるあなた、ああ、あなたが言っていない |
| The upper-case letter Δ can be used to denote
| | 相关的主题文章： |
| *[[Change (mathematics)|Change]] of any changeable quantity, in mathematics and the sciences (More specifically, the [[difference operator]]{{citation needed|date=November 2012}}); for example, in
| | <ul> |
| ::<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
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| *The [[Laplace operator]]:
| | <li>[http://www.owaki.mmcgi.com/cgi-bin/portaln.cgi http://www.owaki.mmcgi.com/cgi-bin/portaln.cgi]</li> |
| :<math>\Delta f = \sum_{i=1}^n {\frac{\partial^2 f}{\partial x_i^2}}</math>
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| *The [[discriminant]] of a [[polynomial]] equation, especially the [[quadratic equation]]:
| | <li>[http://www.iomastronomy.org/cgi-bin/guestbook/guestbook.cgi http://www.iomastronomy.org/cgi-bin/guestbook/guestbook.cgi]</li> |
| :<math>\Delta = b^2 - 4ac\,\!</math>
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| *The [[symmetric difference]] of two sets
| | <li>[http://jiangxianzaixian.com/bbs/forum.php?mod=viewthread&tid=37890&fromuid=12689 http://jiangxianzaixian.com/bbs/forum.php?mod=viewthread&tid=37890&fromuid=12689]</li> |
| *A [[derivative|macroscopic change]] in the value of a variable in mathematics or science
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| *[[Uncertainty]] in a physical variable as seen in for instance the [[uncertainty principle]]
| | </ul> |
| *An interval of possible values for a given quantity for instance across a sample{{Citation needed|date=August 2008}}
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| *Any of the [[Delta baryon|delta particles]] in particle physics
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| *The determinant of the matrix of coefficients of a set of linear equations (see [[Cramer's Rule]])
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| *That an associated [[locant]] number represents the location of a [[covalent bond]] in an [[organic compound]], the position of which is variant between [[isomers|isomeric]] forms
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| *In chemistry, it is often used to represent the addition of heat in a reaction.
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| *In [[legal shorthand]], it represents a [[defendant]]
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| *In the financial markets, it is one of the [[Greeks (finance)|Greeks]] that describes the rate of change of an option price for a given change in the underlying benchmark
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| *It is the symbol of the Greek inventor and architect [[Daedalus]]
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| *Signifies a major seventh chord in jazz music notation.
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| *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
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| *The [http://ada.org/ American Dental Association] cites it (together with omicron for "odont") as the symbol of dentistry.<ref>[http://www.ada.org/2517.aspx?currentTab=2 Caduceus, the emblem of dentistry - American Dental Association - ADA.org]</ref>
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| *English [[indie rock]] band [[Alt-J]] (The symbol can be typed on a [[OS X|Mac OS X]] computer system by pressing Alt-J).
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| ==Lower case==
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| [[File:NAMA Alphabet grec.jpg|thumb|right|The [[alphabet]] on a [[black figure]] vessel, with a D-shaped delta.]] | |
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| The lower-case letter δ (or 𝛿) can be used to denote
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| *An [[differential (infinitesimal)|infinitesimal change]] in the value of a variable in [[infinitesimal calculus]]
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| *An auxiliary function in [[Calculus]] used to rigorously define the [[Limit of a function|limit]] or [[Continuous function|continuity]] of a given function.
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| *The [[Kronecker delta]] in mathematics
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| *The [[Dirac delta function]] in mathematics
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| *The boundary of a set is denoted by δA, where A is some set, in mathematics, specifically point-set topology
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| *The transition function in [[Finite state machine|automata]]
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| *[[Deflection (engineering)|Deflection]] in engineering mechanics
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| *The [[Compound interest|Force of Interest]] in actuarial science
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| *The [[chemical shift]] of [[Nuclear Magnetic Resonance]] in chemistry
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| *The relative [[electronegativity]] of different atoms in a molecule, δ<sup>−</sup> being more electronegative than δ<sup>+</sup>
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| *Text requiring deletion in [[proofreading]]. The usage is said to date back to classical times
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| *In some of the manuscripts written by Dr. [[John Dee (mathematician)|John Dee]], the character of delta is used to represent Dee.
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| *Is a subunit of the F1 sector of the [[F-ATPase]]
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| *The [[declination]] of an object in the [[equatorial coordinate system]] of [[astronomy]]
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| *The dividend yield on the [[Black–Scholes]] option pricing formula
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| *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
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| *The rate of depreciation of the aggregate capital stock of an economy in an [[exogenous growth model]] in [[macroeconomics]].<ref>http://econ.duke.edu/people?subpage=unit&Gurl=%2Faas%2FEconomics&cname=Masters+Students</ref>
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| *The angle between tension and current in High Voltage insulating testing. Measured value is "tan δ"
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| ==Meteorology==
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| *Delta was used as a name during the [[1972 Atlantic hurricane season]] and the [[2005 Atlantic hurricane season]] as [[Tropical Storm Delta (2005)]].
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| ==Computer encodings==
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| * Greek Delta / Coptic Dalda
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| {{charmap
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| |0394|name1=Greek Capital Letter Delta
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| |03B4|name2=Greek Small Letter Delta
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| |1F5F|name3=Modifier Letter Small Delta
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| |2C86|name3=Coptic Capital Letter Dalda
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| |2C87|name4=Coptic Small Letter Dalda
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| |map2=DOS Greek|map2char1=83|map2char2=9B
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| |map3=DOS Greek-2|map3char1=A7|map3char2=DD
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| |map4=Windows 1253|map4char1=C4|map4char2=E4
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| |namedref1=TeX|ref1char1=\Delta|ref1char2=\delta
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| }}
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| * Latin Delta
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| {{charmap
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| |1E9F|name1=Latin Small Letter Delta
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| |018D|name2=Latin Small Letter Turned Delta
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| }}
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| * Technical and Mathematical symbols
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| {{charmap
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| |2206|name1=Increment
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| |2207|name2=Nabla
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| |225C|name3=Delta Equal To
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| |234B|name4=APL Functional Symbol Delta Stile
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| |234D|name5=APL Functional Symbol Quad Delta
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| |2359|name6=APL Functional Symbol Delta Underbar
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| }}
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| * Mathematical Delta
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| {{charmap
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| |1D6AB|name1=Mathematical Bold<br />Capital Delta
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| |1D6C5|name2=Mathematical Bold<br />Small Delta
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| |1D6E5|name3=Mathematical Italic<br />Capital Delta
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| |1D6FF|name4=Mathematical Italic<br />Small Delta
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| |1D71F|name5=Mathematical Bold Italic<br />Capital Delta
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| |1D739|name6=Mathematical Bold Italic<br />Small Delta
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| }}
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| {{charmap
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| |1D759|name1=Mathematical Sans-Serif<br />Bold Capital Delta
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| |1D773|name2=Mathematical Sans-Serif<br />Bold Small Delta
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| |1D793|name3=Mathematical Sans-Serif<br />Bold Italic Capital Delta
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| |1D7AD|name4=Mathematical Sans-Serif<br />Bold Italic Small Delta
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| }}
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| These characters are used only as mathematical symbols. Stylized Greek text should be encoded using the normal Greek letters, with markup and formatting to indicate text style.
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| ==See also== | |
| * [[D|D, d]]
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| * [[De (Cyrillic)|Д, д]]
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| * [[ẟ]] - Latin delta
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| * [[∂]] - the [[partial derivative]] symbol, sometimes mistaken for a lowercase Greek letter Delta.
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| * [[ð]] - the small [[eth]] appears similar to a small delta, and also represents a ''d'' sound in some contexts
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| * [[Th (digraph)]]
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| * [[Greek letters used in mathematics, science, and engineering]]
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| * ∇ - [[Nabla symbol]]
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| ==References==
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| <references/> | |
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| Minishoter RS Delta: Infinity Delta, Double Delta
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| [[Category:Greek letters]]
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