U+21A3 Rightwards Arrow with Tail
U+21A3 wurde in Version 1.1 in 1993 zu Unicode hinzugefügt. Er gehört zum Block
Dieses Zeichen ist ein Math Symbol und wird allgemein verwendet, das heißt, in keiner speziellen Schrift. Das Schriftzeichen ist auch bekannt als z notation total injection.
Das Zeichen ist keine Zusammensetzung. Es hat keine zugewiesene Weite in ostasiatischen Texten. In bidirektionalem Text handelt es als Other Neutral. Bei einem Richtungswechsel wird es nicht gespiegelt. Das Wort, das U+21A3 mit ähnlichen Zeichen bildet, verbietet in sich Zeilenumbrüche.
Das CLDR-Projekt bezeichnet dieses Zeichen mit „Pfeilschwanz nach rechts“ für die Verwendung in Screenreader-Software.
Die Wikipedia hat die folgende Information zu diesem Codepunkt:
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, x1 ≠ x2 implies f(x1) ≠ f(x2). (Equivalently, f(x1) = f(x2) implies x1 = 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 that is not injective is sometimes called many-to-one.
Darstellungen
System | Darstellung |
---|---|
Nr. | 8611 |
UTF-8 | E2 86 A3 |
UTF-16 | 21 A3 |
UTF-32 | 00 00 21 A3 |
URL-kodiert | %E2%86%A3 |
HTML hex reference | ↣ |
Falsches windows-1252-Mojibake | ↣ |
HTML named entity | ↣ |
HTML named entity | ↣ |
Alias | z notation total injection |
LATEX | \rightarrowtail |
Anderswo
Vollständiger Eintrag
Eigenschaft | Wert |
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1.1 (1993) | |
RIGHTWARDS ARROW WITH TAIL | |
RIGHT ARROW WITH TAIL | |
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