U+1D456 "𝑖" Mathematical Italic Small I Unicode Character

U+1D456 "𝑖" Mathematical Italic Small I is a typographic variant of the Latin letter "i" specifically designed for use in mathematical and scientific notation, where it represents an italicized variable, typically an index or an imaginary unit. It belongs to the Mathematical Alphanumeric Symbols block, allowing authors to distinguish mathematical italic characters from ordinary text, preventing formatting conflicts with default italic styling in documents. This character ensures semantic clarity in equations and technical writing, particularly in fields like physics, engineering, and advanced mathematics, where the same letter may serve both textual and symbolic roles.

General Properties

Code Point	U+1D456
Version Added	3.1
Name	Mathematical 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 0x91 0x96
UTF-16 Encoding	0xD835 0xDC56
UTF-32 Encoding	0x0001D456
C/C++/Java Escape	\ud835\udc56

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