U+1D466 "𝑦" Mathematical Italic Small Y Unicode Character

U+1D466 "𝑦" Mathematical Italic Small Y is a typographic symbol that represents a stylized, slanted version of the lowercase letter "y," specifically designed for use in mathematical and scientific notation. It belongs to the "Mathematical Alphanumeric Symbols" block, which was added to Unicode to distinguish mathematical variables from regular text, preventing ambiguity in digital typesetting. This character is intended for italicized variables in formulas, such as representing a generic dependent variable or coordinate, and it should not be confused with ordinary italic text or the visually similar Greek letter upsilon. Its use ensures that mathematical expressions are rendered consistently across different software and platforms.

General Properties

Code Point	U+1D466
Version Added	3.1
Name	Mathematical Italic Small Y
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"y" U+0079 Latin Small Letter Y

Encodings

HTML Decimal Encoding	𝑦
HTML Hex Encoding	𝑦
UTF-8 Encoding	0xF0 0x9D 0x91 0xA6
UTF-16 Encoding	0xD835 0xDC66
UTF-32 Encoding	0x0001D466
C/C++/Java Escape	\ud835\udc66

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	"y" U+0079 Latin Small Letter Y
NFKC Simple Casefold	"y" U+0079 Latin Small Letter Y
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