U+1D701 "𝜁" Mathematical Italic Small Zeta Unicode Character

U+1D701 "𝜁" Mathematical Italic Small Zeta is a typographic variant of the Greek letter zeta, specifically designed for use in mathematical and scientific notation where italicized symbols are preferred to distinguish variables or constants from standard text. It belongs to the "Mathematical Alphanumeric Symbols" block, which provides distinct character forms to avoid semantic ambiguity in technical documents, particularly when a plain Greek letter might be misinterpreted as a formatting artifact. This character is often employed in fields like physics, engineering, and pure mathematics to represent quantities such as the Riemann zeta function’s variable or damping ratios, enabling precise and consistent typesetting in digital content.

General Properties

Code Point	U+1D701
Version Added	3.1
Name	Mathematical Italic Small Zeta
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"ζ" U+03B6 Greek Small Letter Zeta

Encodings

HTML Decimal Encoding	𝜁
HTML Hex Encoding	𝜁
UTF-8 Encoding	0xF0 0x9D 0x9C 0x81
UTF-16 Encoding	0xD835 0xDF01
UTF-32 Encoding	0x0001D701
C/C++/Java Escape	\ud835\udf01

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	"ζ" U+03B6 Greek Small Letter Zeta
NFKC Simple Casefold	"ζ" U+03B6 Greek Small Letter Zeta
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