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Mathematical Operators (Unicode block)

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Short description: Unicode character block
Mathematical Operators
RangeU+2200..U+22FF
(256 code points)
PlaneBMP
ScriptsCommon
Symbol setsMathematical symbols
Logic and Set operators
Relation symbols
Assigned256 code points
Unused0 reserved code points
Unicode version history
1.0.0242 (+242)
3.2256 (+14)
Note: [1][2]

Mathematical Operators is a Unicode block containing characters for mathematical, logical, and set notation.

Notably absent are the plus sign (+), greater than sign (>) and less than sign (<), due to them already appearing in the Basic Latin Unicode block, and the plus-or-minus sign (±), multiplication sign (×) and obelus (÷), due to them already appearing in the Latin-1 Supplement block, although a distinct minus sign (−) is included, semantically different from the Basic Latin hyphen-minus (-).

Block

Variation sequences

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):

Variation sequences
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

The following Unicode-related documents record the purpose and process of defining specific characters in the Mathematical Operators block:

Version Final code points[lower-alpha 1] Count UTC ID L2 ID WG2 ID Document
1.0.0 U+2200..22F1 242 (to be determined)
UTC/1999-013 Karlsson, Kent (1999-05-27), Tildes and micro sign decompositions 
L2/99-176R Moore, Lisa (1999-11-04), Minutes from the joint UTC/L2 meeting in Seattle, June 8-10, 1999 
L2/00-115R2 Moore, Lisa (2000-08-08), Minutes Of UTC Meeting #83 
L2/01-342 Suignard, Michel (2001-09-10), 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. (2007-07-26), Unconfirmed minutes of WG 2 meeting 50, Frankfurt-am-Main, Germany; 2007-04-24/27 
L2/15-268 Beeton, Barbara; Freytag, Asmus; Iancu, Laurențiu; Sargent, Murray (2015-10-30), Proposal to Represent the Slashed Zero Variant of Empty Set 
L2/15-254 Moore, Lisa (2015-11-16), UTC #145 Minutes 
3.2 U+22F2..22FF 14 L2/00-119[lower-alpha 2] N2191R Whistler, Ken; Freytag, Asmus (2000-04-19), Encoding Additional Mathematical Symbols in Unicode 
L2/00-234 N2203 (rtf, txt) Umamaheswaran, V. S. (2000-07-21), Minutes from the SC2/WG2 meeting in Beijing, 2000-03-21 -- 24 
L2/00-115R2 Moore, Lisa (2000-08-08), Minutes Of UTC Meeting #83 
  1. ↑ Proposed code points and characters names may differ from final code points and names
  2. ↑ Refer to the history section of the Miscellaneous Mathematical Symbols-B block for additional math-related documents

See also

References

  1. ↑ "Unicode character database". The Unicode Standard. https://www.unicode.org/ucd/. Retrieved 2023-07-26. 
  2. ↑ "Enumerated Versions of The Unicode Standard". The Unicode Standard. https://www.unicode.org/versions/enumeratedversions.html. Retrieved 2023-07-26. 
  3. ↑ "Unicode Character Database: Standardized Variation Sequences". The Unicode Consortium. https://www.unicode.org/Public/UNIDATA/StandardizedVariants.txt. 
  4. ↑ Whistler, Ken; Freytag, Asmus (2000-04-19), L2/00-119: Encoding Additional Mathematical Symbols in Unicode, https://www.unicode.org/L2/L2000/00119-math.pdf 



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