Home U+1D400 to U+1D7FF Mathematical Alphanumeric Symbols
Glyph for U+1D7D9
Source: Noto Sans Math

U+1D7D9 Mathematical Double-Struck Digit One

U+1D7D9 was added in Unicode version 3.1 in 2001. It belongs to the block U+1D400 to U+1D7FF Mathematical Alphanumeric Symbols in the U+10000 to U+1FFFF Supplementary Multilingual Plane.

This character is a Decimal Number and is commonly used, that is, in no specific script. The codepoint has the decimal valueΒ 1.

The glyph is a font version of the glyph Glyph for U+0031 Digit One. It has no designated width in East Asian texts. In bidirectional text it is written as European number from left to right. When changing direction it is not mirrored. This number joins with other adjacent letters and numbers to form a word. U+1D7D9 forms a number with similar characters, which 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 linear algebra, the identity matrix of size n is the nΓ—n square matrix with ones on the main diagonal and zeros elsewhere. It has unique properties, for example when the identity matrix represents a geometric transformation, the object remains unchanged by the transformation. In other contexts, it is analogous to multiplying by the number 1.

Representations

System Representation
NΒΊ 120793
UTF-8 F0 9D 9F 99
UTF-16 D8 35 DF D9
UTF-32 00 01 D7 D9
URL-Quoted %F0%9D%9F%99
HTML hex reference 𝟙
Wrong windows-1252 Mojibake ðŸℒ
LATEX \mathbb{1}

Related Characters

Confusables

Elsewhere

Complete Record

Property Value
Age (age) 3.1 (2001)
Unicode Name (na) MATHEMATICAL DOUBLE-STRUCK DIGIT ONE
Unicode 1 Name (na1) β€”
Block (blk) Mathematical Alphanumeric Symbols
General Category (gc) Decimal Number
Script (sc) Common
Bidirectional Category (bc) European Number
Combining Class (ccc) Not Reordered
Decomposition Type (dt) font
Decomposition Mapping (dm) Glyph for U+0031 Digit One
Lowercase (Lower) ✘
Simple Lowercase Mapping (slc) Glyph for U+1D7D9 Mathematical Double-Struck Digit One
Lowercase Mapping (lc) Glyph for U+1D7D9 Mathematical Double-Struck Digit One
Uppercase (Upper) ✘
Simple Uppercase Mapping (suc) Glyph for U+1D7D9 Mathematical Double-Struck Digit One
Uppercase Mapping (uc) Glyph for U+1D7D9 Mathematical Double-Struck Digit One
Simple Titlecase Mapping (stc) Glyph for U+1D7D9 Mathematical Double-Struck Digit One
Titlecase Mapping (tc) Glyph for U+1D7D9 Mathematical Double-Struck Digit One
Case Folding (cf) Glyph for U+1D7D9 Mathematical Double-Struck Digit One
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) βœ”
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+1D7D9 Mathematical Double-Struck Digit One
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base) βœ”
Grapheme Extend (Gr_Ext) ✘
Grapheme Link (Gr_Link) ✘
Hex Digit (Hex) ✘
Hyphen (Hyphen) ✘
ID Continue (IDC) βœ”
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) β€”
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
Jamo Short Name (JSN) β€”
Join Control (Join_C) ✘
Logical Order Exception (LOE) ✘
Math (Math) βœ”
Noncharacter Code Point (NChar) ✘
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) Glyph for U+0031 Digit One
NFKC Quick Check (NFKC_QC) No
NFKC_SCF (NFKC_SCF) Glyph for U+0031 Digit One
NFKD Quick Check (NFKD_QC) No
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) βœ”
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) Numeric
Soft Dotted (SD) ✘
Sentence Terminal (STerm) ✘
Terminal Punctuation (Term) ✘
Unified Ideograph (UIdeo) ✘
Variation Selector (VS) ✘
Word Break (WB) Numeric
White Space (WSpace) ✘
XID Continue (XIDC) βœ”
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+1D7D9 Mathematical Double-Struck Digit One
Bidi Paired Bracket Type (bpt) None
East Asian Width (ea) neutral
Hangul Syllable Type (hst) Not Applicable
ISO 10646 Comment (isc) β€”
Joining Group (jg) No_Joining_Group
Joining Type (jt) Non Joining
Line Break (lb) Numeric
Numeric Type (nt) decimal
Numeric Value (nv) 1
Simple Case Folding (scf) Glyph for U+1D7D9 Mathematical Double-Struck Digit One
Script Extension (scx)
Vertical Orientation (vo) R