数学运算符 (Unicode区段)

数学运算符
Mathematical Operators
数学运算符; Mathematical Operators
範圍	U+2200..U+22FF; （256個碼位）
平面	基本多文種平面（BMP）
文字	通用
符號系列	數學符號; 邏輯和集合運算符; 關係符號
已分配	256個碼位
未分配	0個保留碼位
統一碼版本歷史
1.0.0	242 (+242)
3.2	256 (+14)
碼表
	點擊此處
	註釋：

本页面有特殊字符，操作系统及浏览器須支持特殊字母与符号才能正確显示，否则可能變成乱码、问号、空格等其它符号。

数学运算符是一個位於基本多文種平面的Unicode區塊，收錄了數學符號、邏輯符號和集合符號。

值得注意的是，本區塊沒有加號（+）、大于號（>）和小于號（<），因爲它們已經出現在基本拉丁字母Unicode區塊中。也沒有正負號（±）、乘號（×）和除號（÷），因爲它們也已編碼于拉丁字母補充-1區塊中。但本區塊包含另外一種减號（-），與基本拉丁字母區塊的連字暨減號（-）不同。

區塊

数学运算符 Mathematical Operators^[1] Unicode Consortium 官方碼表（PDF）
	0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
U+220x	∀	∁	∂	∃	∄	∅	∆	∇	∈	∉	∊	∋	∌	∍	∎	∏
U+221x	∐	∑	−	∓	∔	∕	∖	∗	∘	∙	√	∛	∜	∝	∞	∟
U+222x	∠	∡	∢	∣	∤	∥	∦	∧	∨	∩	∪	∫	∬	∭	∮	∯
U+223x	∰	∱	∲	∳	∴	∵	∶	∷	∸	∹	∺	∻	∼	∽	∾	∿
U+224x	≀	≁	≂	≃	≄	≅	≆	≇	≈	≉	≊	≋	≌	≍	≎	≏
U+225x	≐	≑	≒	≓	≔	≕	≖	≗	≘	≙	≚	≛	≜	≝	≞	≟
U+226x	≠	≡	≢	≣	≤	≥	≦	≧	≨	≩	≪	≫	≬	≭	≮	≯
U+227x	≰	≱	≲	≳	≴	≵	≶	≷	≸	≹	≺	≻	≼	≽	≾	≿
U+228x	⊀	⊁	⊂	⊃	⊄	⊅	⊆	⊇	⊈	⊉	⊊	⊋	⊌	⊍	⊎	⊏
U+229x	⊐	⊑	⊒	⊓	⊔	⊕	⊖	⊗	⊘	⊙	⊚	⊛	⊜	⊝	⊞	⊟
U+22Ax	⊠	⊡	⊢	⊣	⊤	⊥	⊦	⊧	⊨	⊩	⊪	⊫	⊬	⊭	⊮	⊯
U+22Bx	⊰	⊱	⊲	⊳	⊴	⊵	⊶	⊷	⊸	⊹	⊺	⊻	⊼	⊽	⊾	⊿
U+22Cx	⋀	⋁	⋂	⋃	⋄	⋅	⋆	⋇	⋈	⋉	⋊	⋋	⋌	⋍	⋎	⋏
U+22Dx	⋐	⋑	⋒	⋓	⋔	⋕	⋖	⋗	⋘	⋙	⋚	⋛	⋜	⋝	⋞	⋟
U+22Ex	⋠	⋡	⋢	⋣	⋤	⋥	⋦	⋧	⋨	⋩	⋪	⋫	⋬	⋭	⋮	⋯
U+22Fx	⋰	⋱	⋲	⋳	⋴	⋵	⋶	⋷	⋸	⋹	⋺	⋻	⋼	⋽	⋾	⋿
註釋 1.^ 依據 Unicode 14.0

變體序列

本區塊為标准化變體定義了16個變體序列。^[3]^[4]採用U+FE00 ︀ VARIATION SELECTOR-1（VS01）呈現變體符號（取決於字體）：

變體序列
Base character	基本	+VS	描述
U+2205 EMPTY SET	∅	∅︀	zero with long diagonal stroke overlay form
U+2229 INTERSECTION	∩	∩︀	with serifs
U+222A UNION	∪	∪︀	with serifs
U+2268 LESS-THAN BUT NOT EQUAL TO	≨	≨︀	with vertical stroke
U+2269 GREATER-THAN BUT NOT EQUAL TO	≩	≩︀	with vertical stroke
U+2272 LESS-THAN OR EQUIVALENT TO	≲	≲︀	following the slant of the lower leg
U+2273 GREATER-THAN OR EQUIVALENT TO	≳	≳︀	following the slant of the lower leg
U+228A SUBSET OF WITH NOT EQUAL TO	⊊	⊊︀	with stroke through bottom members
U+228B SUPERSET OF WITH NOT EQUAL TO	⊋	⊋︀	with stroke through bottom members
U+2293 SQUARE CAP	⊓	⊓︀	with serifs
U+2294 SQUARE CUP	⊔	⊔︀	with serifs
U+2295 CIRCLED PLUS	⊕	⊕︀	with white rim
U+2297 CIRCLED TIMES	⊗	⊗︀	with white rim
U+229C CIRCLED EQUALS	⊜	⊜︀	with equal sign touching the circle
U+22DA LESS-THAN EQUAL TO OR GREATER-THAN	⋚	⋚︀	with slanted equal
U+22DB GREATER-THAN EQUAL TO OR LESS-THAN	⋛	⋛︀	with slanted equal

歷史

以下Unicode文檔記錄了定義本區塊中特定字符的目的與過程：

版本	最終碼位^[a]	碼位数	UTC ID	L2（英语：International Committee for Information Technology Standards） ID	WG2（英语：ISO/IEC JTC 1/SC 2） ID	文檔
1.0.0	U+2200..22F1	242				（待考）
			UTC/1999-013			Karlsson, Kent, Tildes and micro sign decompositions, 1999-05-27
				L2/99-176R		Moore, Lisa, Not Tilde, Minutes from the joint UTC/L2 meeting in Seattle, June 8-10, 1999, 1999-11-04
				L2/00-115R2		Moore, Lisa, Motion 83-M21, Minutes Of UTC Meeting #83, 2000-08-08
				L2/01-342		Suignard, Michel, T.9 B.1 List of combining characters/Variation selectors, Comments accompanying the US positive vote on the FPDAM 1 to ISO/IEC 10646-1:2001, 2001-09-10
				L2/07-268	N3253 (pdf, doc)	Umamaheswaran, V. S., M50.7 (Math symbol glyph correction) [U+22C4], Unconfirmed minutes of WG 2 meeting 50, Frankfurt-am-Main, Germany; 2007-04-24/27, 2007-07-26
				L2/15-268		Beeton, Barbara; Freytag, Asmus; Iancu, Laurențiu; Sargent, Murray, Proposal to Represent the Slashed Zero Variant of Empty Set, 2015-10-30
				L2/15-254		Moore, Lisa, B.12.1.2 Proposal to Represent the Slashed Zero Variant of Empty Set, UTC #145 Minutes, 2015-11-16
3.2	U+22F2..22FF	14		L2/00-119^[b]	N2191R	Whistler, Ken; Freytag, Asmus, Encoding Additional Mathematical Symbols in Unicode, 2000-04-19
				L2/00-234	N2203 (rtf, txt)	Umamaheswaran, V. S., 8.18, Minutes from the SC2/WG2 meeting in Beijing, 2000-03-21 -- 24, 2000-07-21
				L2/00-115R2		Moore, Lisa, Motion 83-M11, Minutes Of UTC Meeting #83, 2000-08-08
^ 建議的碼位和字符名稱可能與最終的結果不同。 ^ 參閱「雜項數學符號-B」區塊的歷史一節以查看更多與數學有關的文檔。

另見

參考資料

^ Unicode character database. The Unicode Standard. [2016-07-09].
^ Enumerated Versions of The Unicode Standard. The Unicode Standard. [2016-07-09].
^ Unicode Character Database: Standardized Variation Sequences. The Unicode Consortium. [2022-06-05].
^ Whistler, Ken; Freytag, Asmus, Symbol variants defined using a Variation Selector, L2/00-119: Encoding Additional Mathematical Symbols in Unicode (PDF), 2000-04-19 [2022-06-05]

[final-5] 建議的碼位和字符名稱可能與最終的結果不同。

[mathdocs-6] 參閱「雜項數學符號-B」區塊的歷史一節以查看更多與數學有關的文檔。

[1] Unicode character database. The Unicode Standard. [2016-07-09].

[2] Enumerated Versions of The Unicode Standard. The Unicode Standard. [2016-07-09].

[3] Unicode Character Database: Standardized Variation Sequences. The Unicode Consortium. [2022-06-05].

[4] Whistler, Ken; Freytag, Asmus, Symbol variants defined using a Variation Selector, L2/00-119: Encoding Additional Mathematical Symbols in Unicode (PDF), 2000-04-19 [2022-06-05]

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