U+1D6A4 "𝚤" Mathematical Italic Small Dotless I Unicode Character

U+1D6A4 "𝚤" Mathematical Italic Small Dotless I is a typographic variant of the lowercase letter "i" specifically designed for mathematical notation, where it is often used to represent the imaginary unit or as a variable in complex numbers and vector calculus, featuring an italicized form without the usual tittle or dot. This distinction helps avoid confusion with dotted "i" characters that might be misinterpreted in formulas, particularly in fields like algebra, engineering, and physics, where it serves as a clear, unambiguous symbol within the larger set of mathematical alphanumeric symbols.

General Properties

Code Point	U+1D6A4
Version Added	4.1
Name	Mathematical Italic Small Dotless I
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"ı" U+0131 Latin Small Letter Dotless I

Encodings

HTML Decimal Encoding	𝚤
HTML Hex Encoding	𝚤
UTF-8 Encoding	0xF0 0x9D 0x9A 0xA4
UTF-16 Encoding	0xD835 0xDEA4
UTF-32 Encoding	0x0001D6A4
C/C++/Java Escape	\ud835\udea4

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	"ı" U+0131 Latin Small Letter Dotless I
NFKC Simple Casefold	"ı" U+0131 Latin Small Letter Dotless I
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	Lower