U+1D598 "𝖘" Mathematical Bold Fraktur Small S Unicode Character

U+1D598 "𝖘" Mathematical Bold Fraktur Small S is a typographic glyph belonging to the Mathematical Alphanumeric Symbols block, designed for use in mathematical and scientific notation where a bold, blackletter style is required to distinguish variables or denote specific algebraic structures, such as sets or groups. This character combines the traditional Fraktur script, reminiscent of medieval German calligraphy, with a bold weight, making it visually distinct from standard Latin letters. It is not typically used in regular text but serves a specialized purpose in formal mathematics, particularly in fields like set theory, number theory, and abstract algebra, where it helps avoid confusion between similar looking letters.

General Properties

Code Point	U+1D598
Version Added	3.1
Name	Mathematical Bold Fraktur Small S
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"s" U+0073 Latin Small Letter S

Encodings

HTML Decimal Encoding	𝖘
HTML Hex Encoding	𝖘
UTF-8 Encoding	0xF0 0x9D 0x96 0x98
UTF-16 Encoding	0xD835 0xDD98
UTF-32 Encoding	0x0001D598
C/C++/Java Escape	\ud835\udd98

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	"s" U+0073 Latin Small Letter S
NFKC Simple Casefold	"s" U+0073 Latin Small Letter S
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