U+1D476 "𝑶" Mathematical Bold Italic Capital O Unicode Character

U+1D476 "𝑶" Mathematical Bold Italic Capital O is a typographic variant of the Latin letter O, designed for use in mathematical and scientific notation where a bold italic style is required to denote a specific variable, vector, or tensor. It belongs to the Mathematical Alphanumeric Symbols block, a range of code points that provide distinct character forms to avoid ambiguity with plain text and to allow proper formatting in digital documents. This character is distinguished from its standard letter counterpart by its combination of strong, bold weight and slanted italic posture, making it visually a different entity suitable for equations, formulas, and scholarly texts.

General Properties

Code Point	U+1D476
Version Added	3.1
Name	Mathematical Bold Italic Capital O
Block	Mathematical Alphanumeric Symbols
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"O" U+004F Latin Capital Letter O

Encodings

HTML Decimal Encoding	𝑶
HTML Hex Encoding	𝑶
UTF-8 Encoding	0xF0 0x9D 0x91 0xB6
UTF-16 Encoding	0xD835 0xDC76
UTF-32 Encoding	0x0001D476
C/C++/Java Escape	\ud835\udc76

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Uppercase	Yes
Cased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"o" U+006F Latin Small Letter O
NFKC Simple Casefold	"o" U+006F Latin Small Letter O
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Math	Yes
Other Math	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Upper