Mathematical Operators (Unicode block)
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This article is about the Unicode block. For operators in mathematics, see Operator (mathematics). For mathematical symbols in Unicode, including other blocks, see Mathematical operators and symbols in Unicode.
Unicode character block
| Mathematical Operators | |
|---|---|
| Range | U+2200..U+22FF (256 code points) |
| Plane | BMP |
| Scripts | Common |
| Symbol sets | Mathematical symbols Logic and Set operators Relation symbols |
| Assigned | 256 code points |
| Unused | 0 reserved code points |
| Unicode version history | |
| 1.0.0 (1991) | 242 (+242) |
| 3.2 (2002) | 256 (+14) |
| Unicode documentation | |
| Code chart ∣ Web page | |
| Note: [1] [2] | |
This article contains special characters. Without proper rendering support, you may see question marks, boxes, or other symbols.
Mathematical Operators is a Unicode block containing characters for mathematical, logical, and set notation.
Notably absent are the plus sign ({\displaystyle +}), greater than sign ({\displaystyle >}) and less than sign ({\displaystyle <}), due to them already appearing in the Basic Latin Unicode block, and the plus-or-minus sign ({\displaystyle \pm }), multiplication sign ({\displaystyle \times }) and obelus ({\displaystyle \div }), due to them already appearing in the Latin-1 Supplement block, although a distinct minus sign ({\displaystyle -}) is included, semantically different from the Basic Latin hyphen-minus (-).
Block
[edit ]
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Notes
- 1.^ As of Unicode version 17.0
Variation sequences
[edit ]The Mathematical Operators block has sixteen variation sequences defined for standardized variants.[3] [4] They use U+FE00 VARIATION SELECTOR-1 (VS01) to denote variant symbols (depending on the font):
| Base character | Base | +VS01 | Description |
|---|---|---|---|
| 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 |
History
[edit ]The following Unicode-related documents record the purpose and process of defining specific characters in the Mathematical Operators block:
| Version | Final code points[a] | Count | UTC ID | L2 ID | WG2 ID | Document |
|---|---|---|---|---|---|---|
| 1.0.0 | U+2200..22F1 | 242 | (to be determined) | |||
| UTC/1999-013 | Karlsson, Kent (1999年05月27日), Tildes and micro sign decompositions | |||||
| L2/99-176R | Moore, Lisa (1999年11月04日), "Not Tilde", Minutes from the joint UTC/L2 meeting in Seattle, June 8-10, 1999 | |||||
| L2/00-115R2 | Moore, Lisa (2000年08月08日), "Motion 83-M21", Minutes Of UTC Meeting #83 | |||||
| L2/01-342 | Suignard, Michel (2001年09月10日), "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 | |||||
| L2/07-268 | N3253 (pdf, doc) | Umamaheswaran, V. S. (2007年07月26日), "M50.7 (Math symbol glyph correction) [U+22C4]", Unconfirmed minutes of WG 2 meeting 50, Frankfurt-am-Main, Germany; 2007年04月24日/27 | ||||
| L2/15-268 | Beeton, Barbara; Freytag, Asmus; Iancu, Laurențiu; Sargent, Murray (2015年10月30日), Proposal to Represent the Slashed Zero Variant of Empty Set | |||||
| L2/15-254 | Moore, Lisa (2015年11月16日), "B.12.1.2 Proposal to Represent the Slashed Zero Variant of Empty Set", UTC #145 Minutes | |||||
| L2/24-173 | Pentzlin, Karl (2024年06月06日), Proposal to encode a Middle Asterisk as referred to in the German standard DIN 2137 [Affects U+2217] | |||||
| L2/24-166 | Anderson, Deborah; Goregaokar, Manish; Kučera, Jan; Whistler, Ken; Pournader, Roozbeh; Constable, Peter (2024年07月18日), "20. Middle Asterisk [Affects U+2217]", Recommendations to UTC #180 July 2024 on Script Proposals | |||||
| L2/24-159 | Constable, Peter (2024年07月29日), "Section 20. Middle Asterisk", UTC #180 Minutes, Consider adding an annotation to U+2217 that it may be used to represent the telephony asterisk | |||||
| 3.2 | U+22F2..22FF | 14 | L2/00-119 [b] | N2191R | Whistler, Ken; Freytag, Asmus (2000年04月19日), Encoding Additional Mathematical Symbols in Unicode | |
| L2/00-234 | N2203 (rtf, txt) | Umamaheswaran, V. S. (2000年07月21日), "8.18", Minutes from the SC2/WG2 meeting in Beijing, 2000年03月21日 -- 24 | ||||
| L2/00-115R2 | Moore, Lisa (2000年08月08日), "Motion 83-M11", Minutes Of UTC Meeting #83 | |||||
| ||||||
See also
[edit ]References
[edit ]- ^ "Unicode character database". The Unicode Standard. Retrieved 2023年07月26日.
- ^ "Enumerated Versions of The Unicode Standard". The Unicode Standard. Retrieved 2023年07月26日.
- ^ "Unicode Character Database: Standardized Variation Sequences". The Unicode Consortium.
- ^ Whistler, Ken; Freytag, Asmus (2000年04月19日), "Symbol variants defined using a Variation Selector", L2/00-119: Encoding Additional Mathematical Symbols in Unicode (PDF)