Home U+2190 to U+21FF Arrows
Glyph for U+21A3
Source: Noto Sans Math

U+21A3 RIGHTWARDS ARROW WITH TAIL

U+21A3 was added to Unicode in version 1.1 (1993). It belongs to the block U+2190 to U+21FF Arrows in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Math Symbol and is commonly used, that is, in no specific script. The character is also known as z notation total injection.

The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. In text U+21A3 behaves as Alphabetic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The CLDR project labels this character “rightwards arrow tail” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: rightwards arrow tail.

The Wikipedia has the following information about this codepoint:

In mathematics, an injective function (also known as injection, or one-to-one function) is a function f that maps distinct elements of its domain to distinct elements; that is, f(x1) = f(x2) implies x1 = x2. (Equivalently, x1x2 implies f(x1) ≠ f(x2) in the equivalent contrapositive statement.) In other words, every element of the function's codomain is the image of at most one element of its domain. The term one-to-one function must not be confused with one-to-one correspondence that refers to bijective functions, which are functions such that each element in the codomain is an image of exactly one element in the domain.

A homomorphism between algebraic structures is a function that is compatible with the operations of the structures. For all common algebraic structures, and, in particular for vector spaces, an injective homomorphism is also called a monomorphism. However, in the more general context of category theory, the definition of a monomorphism differs from that of an injective homomorphism. This is thus a theorem that they are equivalent for algebraic structures; see Homomorphism § Monomorphism for more details.

A function f {displaystyle f} that is not injective is sometimes called many-to-one.

Representations

System Representation
8611
UTF-8 E2 86 A3
UTF-16 21 A3
UTF-32 00 00 21 A3
URL-Quoted %E2%86%A3
HTML-Escape ↣
Wrong windows-1252 Mojibake ↣
HTML-Escape ↣
HTML-Escape ↣
alias z notation total injection
LATEX \rightarrowtail

Elsewhere

Complete Record

Property Value
Age 1.1 (1993)
Unicode Name RIGHTWARDS ARROW WITH TAIL
Unicode 1 Name RIGHT ARROW WITH TAIL
Block Arrows
General Category Math Symbol
Script Common
Bidirectional Category Other Neutral
Combining Class Not Reordered
Decomposition Type None
Decomposition Mapping Glyph for U+21A3 Rightwards Arrow with Tail
Lowercase
Simple Lowercase Mapping Glyph for U+21A3 Rightwards Arrow with Tail
Lowercase Mapping Glyph for U+21A3 Rightwards Arrow with Tail
Uppercase
Simple Uppercase Mapping Glyph for U+21A3 Rightwards Arrow with Tail
Uppercase Mapping Glyph for U+21A3 Rightwards Arrow with Tail
Simple Titlecase Mapping Glyph for U+21A3 Rightwards Arrow with Tail
Titlecase Mapping Glyph for U+21A3 Rightwards Arrow with Tail
Case Folding Glyph for U+21A3 Rightwards Arrow with Tail
ASCII Hex Digit
Alphabetic
Bidi Control
Bidi Mirrored
Bidi Paired Bracket Glyph for U+21A3 Rightwards Arrow with Tail
Bidi Paired Bracket Type None
Cased
Composition Exclusion
Case Ignorable
Full Composition Exclusion
Changes When Casefolded
Changes When Casemapped
Changes When NFKC Casefolded
Changes When Lowercased
Changes When Titlecased
Changes When Uppercased
Dash
Deprecated
Default Ignorable Code Point
Diacritic
East Asian Width Neutral
Emoji Modifier Base
Emoji Component
Emoji Modifier
Emoji
Emoji Presentation
Extender
Extended Pictographic
FC NFKC Closure Glyph for U+21A3 Rightwards Arrow with Tail
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
Grapheme Link
Hex Digit
Hangul Syllable Type Not Applicable
Hyphen
ID Continue
Ideographic
ID Start
IDS Binary Operator
IDS Trinary Operator and
Indic Mantra Category
Indic Positional Category NA
Indic Syllabic Category Other
ISO 10646 Comment
Joining Group No_Joining_Group
Join Control
Jamo Short Name
Joining Type Non Joining
Line Break Alphabetic
Logical Order Exception
Math
Noncharacter Code Point
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Glyph for U+21A3 Rightwards Arrow with Tail
NFKC Quick Check Yes
NFKD Quick Check Yes
Numeric Type None
Numeric Value not a number
Other Alphabetic
Other Default Ignorable Code Point
Other Grapheme Extend
Other ID Continue
Other ID Start
Other Lowercase
Other Math
Other Uppercase
Pattern Syntax
Pattern White Space
Prepended Concatenation Mark
Quotation Mark
Radical
Regional Indicator
Sentence Break Other
Simple Case Folding Glyph for U+21A3 Rightwards Arrow with Tail
Script Extension
Soft Dotted
Sentence Terminal
Terminal Punctuation
Unified Ideograph
Vertical Orientation R
Variation Selector
Word Break Other
White Space
XID Continue
XID Start
Expands On NFC
Expands On NFD
Expands On NFKC
Expands On NFKD