U+03F9 "Ϲ" Greek Capital Lunate Sigma Symbol Unicode Character

U+03F9 "Ϲ" Greek Capital Lunate Sigma Symbol is a variant form of the Greek letter sigma that resembles the Latin letter C rather than the standard Σ shape, used primarily in ancient and medieval Greek manuscripts where the sigma was written in a lunar or crescent form. This character is distinct from the lunate sigma's lowercase counterpart and serves as a capital letter in contexts requiring uppercase representation, such as in inscriptions, papyri, or scholarly editions of Greek texts. It belongs to the Greek and Coptic block in Unicode and is sometimes employed in modern typography for historical or stylistic purposes, though it is not a standard letter in contemporary Greek writing.

General Properties

Code Point	U+03F9
Version Added	4.0
Name	Greek Capital Lunate Sigma Symbol
Block	Greek and Coptic
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Compat
Decomposition Mapping	"Σ" U+03A3 Greek Capital Letter Sigma

Encodings

HTML Decimal Encoding	Ϲ
HTML Hex Encoding	Ϲ
UTF-8 Encoding	0xCF 0xB9
UTF-16 Encoding	0x03F9
UTF-32 Encoding	0x000003F9
C/C++/Java Escape	\u03f9

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Uppercase	Yes
Simple Lowercase Code Point	"ϲ" U+03F2 Greek Lunate Sigma Symbol
Lowercase Code Point	"ϲ" U+03F2 Greek Lunate Sigma Symbol
Simple Case Folding	"ϲ" U+03F2 Greek Lunate Sigma Symbol
Case Folding	"ϲ" U+03F2 Greek Lunate Sigma Symbol
Cased	Yes
Changes When Casefolded	Yes
Changes When Casemapped	Yes
Changes When Lowercased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"σ" U+03C3 Greek Small Letter Sigma
NFKC Simple Casefold	"σ" U+03C3 Greek Small Letter Sigma
Script	Greek
Script Extensions	Greek
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Upper