Glyph for U+2251
Source: Noto Sans Math
U+2251 Geometrically Equal To
U+2251 was added in Unicode version 1.1 in 1993. It belongs to the block U+2200 to U+22FF Mathematical Operators 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 glyph is not a composition . It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral . When changing direction it is not mirrored . The word that U+2251 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph .
The Wikipedia has the following information about this codepoint:
In mathematics, an equivalence relation is a binary relation that is reflexive, symmetric and transitive. The equipollence relation between line segments in geometry is a common example of an equivalence relation. A simpler example is equality. Any number $a$ is equal to itself (reflexive). If $a=b$ , then $b=a$ (symmetric). If $a=b$ and $b=c$ , then $a=c$ (transitive).
Each equivalence relation provides a partition of the underlying set into disjoint equivalence classes. Two elements of the given set are equivalent to each other if and only if they belong to the same equivalence class.
Representations
System
Representation
Nº
8785
UTF-8
E2 89 91
UTF-16
22 51
UTF-32
00 00 22 51
URL-Quoted
%E2%89%91
HTML hex reference
≑
Wrong windows-1252 Mojibake
â‰‘
HTML named entity
≑
HTML named entity
≑
L^{A} T_{E} X
\doteqdot
Adobe Glyph List
geometricallyequal
Related Characters
Confusables
Complete Record
Property
Value
Age (age)
1.1 (1993)
Unicode Name (na)
GEOMETRICALLY EQUAL TO
Unicode 1 Name (na1)
—
Block (blk)
Mathematical Operators
General Category (gc)
Math Symbol
Script (sc)
Common
Bidirectional Category (bc)
Other Neutral
Combining Class (ccc)
Not Reordered
Decomposition Type (dt)
none
Decomposition Mapping (dm)
Glyph for U+2251 Geometrically Equal To
Lowercase (Lower)
✘
Simple Lowercase Mapping (slc)
Glyph for U+2251 Geometrically Equal To
Lowercase Mapping (lc)
Glyph for U+2251 Geometrically Equal To
Uppercase (Upper)
✘
Simple Uppercase Mapping (suc)
Glyph for U+2251 Geometrically Equal To
Uppercase Mapping (uc)
Glyph for U+2251 Geometrically Equal To
Simple Titlecase Mapping (stc)
Glyph for U+2251 Geometrically Equal To
Titlecase Mapping (tc)
Glyph for U+2251 Geometrically Equal To
Case Folding (cf)
Glyph for U+2251 Geometrically Equal To
ASCII Hex Digit (AHex)
✘
Alphabetic (Alpha)
✘
Bidi Control (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)
✘
Deprecated (Dep)
✘
Diacritic (Dia)
✘
Emoji Modifier Base (EBase)
✘
Emoji Component (EComp)
✘
Emoji Modifier (EMod)
✘
Emoji Presentation (EPres)
✘
Emoji (Emoji)
✘
Extender (Ext)
✘
Extended Pictographic (ExtPict)
✘
FC NFKC Closure (FC_NFKC)
Glyph for U+2251 Geometrically Equal To
Grapheme Cluster Break (GCB)
Any
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
Ideographic (Ideo)
✘
InCB (InCB)
None
Indic Mantra Category (InMC)
—
Indic Positional Category (InPC)
NA
Indic Syllabic Category (InSC)
Other
Jamo Short Name (JSN)
—
Join Control (Join_C)
✘
Logical Order Exception (LOE)
✘
Math (Math)
✔
Noncharacter Code Point (NChar)
✘
NFC Quick Check (NFC_QC)
Yes
NFD Quick Check (NFD_QC)
Yes
NFKC Casefold (NFKC_CF)
Glyph for U+2251 Geometrically Equal To
NFKC Quick Check (NFKC_QC)
Yes
NFKC_SCF (NFKC_SCF)
Glyph for U+2251 Geometrically Equal To
NFKD Quick Check (NFKD_QC)
Yes
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)
Other
Soft Dotted (SD)
✘
Sentence Terminal (STerm)
✘
Terminal Punctuation (Term)
✘
Unified Ideograph (UIdeo)
✘
Variation Selector (VS)
✘
Word Break (WB)
Other
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)
Glyph for U+2251 Geometrically Equal To
Bidi Paired Bracket Type (bpt)
None
East Asian Width (ea)
neutral
Hangul Syllable Type (hst)
Not Applicable
ISO 10646 Comment (isc)
—
Joining Group (jg)
No_Joining_Group
Joining Type (jt)
Non Joining
Line Break (lb)
Alphabetic
Numeric Type (nt)
none
Numeric Value (nv)
not a number
Simple Case Folding (scf)
Glyph for U+2251 Geometrically Equal To
Script Extension (scx)
Vertical Orientation (vo)
R