Mathematical Operators (Unicode block)

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

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
1.0.0 (1991)242 (+242)
3.2 (2002)256 (+14)
Unicode documentation
Code chart ∣ Web page
Note: [1][2]

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

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Mathematical Operators[1]
Official Unicode Consortium code chart (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
Notes
1.^ As of Unicode version 16.0

Variation sequences

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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

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

See also

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References

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  1. ^ "Unicode character database". The Unicode Standard. Retrieved 2023-07-26.
  2. ^ "Enumerated Versions of The Unicode Standard". The Unicode Standard. Retrieved 2023-07-26.
  3. ^ "Unicode Character Database: Standardized Variation Sequences". The Unicode Consortium.
  4. ^ Whistler, Ken; Freytag, Asmus (2000-04-19), "Symbol variants defined using a Variation Selector", L2/00-119: Encoding Additional Mathematical Symbols in Unicode (PDF)