Start: go to the homepage U+27F0 bis U+27FF Supplemental Arrows-A
Zeichen für U+27FA
Quelle: Noto Sans Math

U+27FA Long Left Right Double Arrow

U+27FA wurde in Version 3.2 in 2002 zu Unicode hinzugefügt. Er gehört zum Block U+27F0 bis U+27FF Supplemental Arrows-A in der U+0000 bis U+FFFF Basic Multilingual Plane.

Dieses Zeichen ist ein Math Symbol und wird allgemein verwendet, das heißt, in keiner speziellen Schrift.

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+27FA mit ähnlichen Zeichen bildet, verbietet in sich Zeilenumbrüche.

Die Wikipedia hat die folgende Information zu diesem Codepunkt:

In logic and related fields such as mathematics and philosophy, "if and only if" (often shortened as "iff") is paraphrased by the biconditional, a logical connective between statements. The biconditional is true in two cases, where either both statements are true or both are false. The connective is biconditional (a statement of material equivalence), and can be likened to the standard material conditional ("only if", equal to "if ... then") combined with its reverse ("if"); hence the name. The result is that the truth of either one of the connected statements requires the truth of the other (i.e. either both statements are true, or both are false), though it is controversial whether the connective thus defined is properly rendered by the English "if and only if"—with its pre-existing meaning. For example, P if and only if Q means that P is true whenever Q is true, and the only case in which P is true is if Q is also true, whereas in the case of P if Q, there could be other scenarios where P is true and Q is false.

In writing, phrases commonly used as alternatives to P "if and only if" Q include: Q is necessary and sufficient for P, for P it is necessary and sufficient that Q, P is equivalent (or materially equivalent) to Q (compare with material implication), P precisely if Q, P precisely (or exactly) when Q, P exactly in case Q, and P just in case Q. Some authors regard "iff" as unsuitable in formal writing; others consider it a "borderline case" and tolerate its use. In logical formulae, logical symbols, such as and , are used instead of these phrases; see § Notation below.

Darstellungen

System Darstellung
Nr. 10234
UTF-8 E2 9F BA
UTF-16 27 FA
UTF-32 00 00 27 FA
URL-kodiert %E2%9F%BA
HTML hex reference ⟺
Falsches windows-1252-Mojibake ⟺
HTML named entity ⟺
HTML named entity ⟺
HTML named entity ⟺
LATEX \Longleftrightarrow

Anderswo

Vollständiger Eintrag

Eigenschaft Wert
Alter (age) 3.2 (2002)
Unicode-Name (na) LONG LEFT RIGHT DOUBLE ARROW
Unicode-1-Name (na1)
Block (blk) Superscripts and Subscripts
Allgemeine Kategorie (gc) Math Symbol
Schrift (sc) Common
Bidirectional Category (bc) Other Neutral
Combining Class (ccc) Not Reordered
Dekompositionstyp (dt) none
Decomposition Mapping (dm) Zeichen für U+27FA Long Left Right Double Arrow
Kleinbuchstabe (Lower)
Simple Lowercase Mapping (slc) Zeichen für U+27FA Long Left Right Double Arrow
Lowercase Mapping (lc) Zeichen für U+27FA Long Left Right Double Arrow
Großbuchstabe (Upper)
Simple Uppercase Mapping (suc) Zeichen für U+27FA Long Left Right Double Arrow
Uppercase Mapping (uc) Zeichen für U+27FA Long Left Right Double Arrow
Simple Titlecase Mapping (stc) Zeichen für U+27FA Long Left Right Double Arrow
Titlecase Mapping (tc) Zeichen für U+27FA Long Left Right Double Arrow
Case Folding (cf) Zeichen für U+27FA Long Left Right Double Arrow
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi-Kontrollzeichen (Bidi_C)
Bidi Mirrored (Bidi_M)
Composition Exclusion (CE)
Case Ignorable (CI)
Changes When Casefolded (CWCF)
Changes When Casemapped (CWCM)
Changes When NFKC Casefolded (CWKCF)
Changes When Lowercased (CWL)
Changes When Titlecased (CWT)
Changes When Uppercased (CWU)
Cased (Cased)
Full Composition Exclusion (Comp_Ex)
Default Ignorable Code Point (DI)
Dash (Dash)
Veraltet (Dep)
Diakritisch (Dia)
Emoji Modifier Base (EBase)
Emoji Component (EComp)
Emoji Modifier (EMod)
Emoji-Darstellung (EPres)
Emoji (Emoji)
Extender (Ext)
Extended Pictographic (ExtPict)
FC NFKC Closure (FC_NFKC) Zeichen für U+27FA Long Left Right Double Arrow
Grapheme Cluster Break (GCB) Egal
Grapheme Base (Gr_Base)
Grapheme Extend (Gr_Ext)
Grapheme Link (Gr_Link)
Hex Digit (Hex)
Hyphen (Hyphen)
ID Continue (IDC)
ID-Start (IDS)
IDS Binary Operator (IDSB)
IDS Trinary Operator and (IDST)
IDSU (IDSU) 0
ID_Compat_Math_Continue (ID_Compat_Math_Continue) 0
ID_Compat_Math_Start (ID_Compat_Math_Start) 0
Ideogramm (Ideo)
InCB (InCB) None
Indic Mantra Category (InMC)
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
Jamo Short Name (JSN)
Verbindungskontrollzeichen (Join_C)
Logische Reihenfolgenausnahme (LOE)
Math (Math)
Nicht-Zeichen-Codepunkt (NChar)
NFC Quick Check (NFC_QC) Ja
NFD Quick Check (NFD_QC) Ja
NFKC Casefold (NFKC_CF) Zeichen für U+27FA Long Left Right Double Arrow
NFKC Quick Check (NFKC_QC) Ja
NFKC_SCF (NFKC_SCF) Zeichen für U+27FA Long Left Right Double Arrow
NFKD Quick Check (NFKD_QC) Ja
Other Alphabetic (OAlpha)
Other Default Ignorable Code Point (ODI)
Other Grapheme Extend (OGr_Ext)
Other ID Continue (OIDC)
Other ID Start (OIDS)
Other Lowercase (OLower)
Other Math (OMath)
Other Uppercase (OUpper)
Prepended Concatenation Mark (PCM)
Pattern Syntax (Pat_Syn)
Pattern White Space (Pat_WS)
Quotation Mark (QMark)
Regional Indicator (RI)
Radical (Radical)
Sentence Break (SB) Andere
Soft Dotted (SD)
Sentence Terminal (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) Andere
White Space (WSpace)
XID Continue (XIDC)
XID-Start (XIDS)
Expands On NFC (XO_NFC)
Expands On NFD (XO_NFD)
Expands On NFKC (XO_NFKC)
Expands On NFKD (XO_NFKD)
Bidi Paired Bracket (bpb) Zeichen für U+27FA Long Left Right Double Arrow
Bidi Paired Bracket Type (bpt) None
Ostasiatische Weite (ea) neutral
Hangul Syllable Type (hst) Nicht anwendbar
ISO 10646 Comment (isc)
Joining Group (jg) No_Joining_Group
Joining Type (jt) Non Joining
Line Break (lb) Alphabetic
Numerischer Typ (nt) none
Numerischer Wert (nv) keine Nummer
Simple Case Folding (scf) Zeichen für U+27FA Long Left Right Double Arrow
Schrifterweiterung (scx)
Vertical Orientation (vo) R