U+1D48A "𝒊" Mathematical Bold Italic Small I Unicode Character

U+1D48A "𝒊" Mathematical Bold Italic Small I is a typographic glyph designed for mathematical and scientific notation, representing the letter "i" in a bold italic style within the Mathematical Alphanumeric Symbols block. This character is part of a standardized set that allows authors to clearly distinguish variables, constants, and other markers from regular text, ensuring precision in formulas and equations. It is commonly used in fields such as physics, engineering, and computer science to denote the imaginary unit, index variables, or other specific mathematical entities where both weight and slant are needed for clarity or stylistic convention.

General Properties

Code Point	U+1D48A
Version Added	3.1
Name	Mathematical Bold Italic Small I
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"i" U+0069 Latin Small Letter I

Encodings

HTML Decimal Encoding	𝒊
HTML Hex Encoding	𝒊
UTF-8 Encoding	0xF0 0x9D 0x92 0x8A
UTF-16 Encoding	0xD835 0xDC8A
UTF-32 Encoding	0x0001D48A
C/C++/Java Escape	\ud835\udc8a

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Lowercase	Yes
Cased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"i" U+0069 Latin Small Letter I
NFKC Simple Casefold	"i" U+0069 Latin Small Letter I
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Soft Dotted	Yes
Alphabetic	Yes
Math	Yes
Other Math	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Lower