U+1D798 "𝞘" Mathematical Sans-Serif Bold Italic Capital Iota Unicode Character

Unicode Version 17.0

𝞘

U+1D798 "𝞘" Mathematical Sans-Serif Bold Italic Capital Iota is a typographic glyph designed for use in mathematical and scientific notation, representing a sans-serif, bold, and italicized version of the Greek capital letter Iota. It belongs to the Unicode block “Mathematical Alphanumeric Symbols,” which was specifically created to provide distinct, style-specific characters that allow mathematicians and scientists to represent variables, constants, and other symbolic elements without relying on font-based formatting or markup. This particular character ensures clear visual distinction in contexts such as vector notation, tensor algebra, or multi-font mathematical expressions, where precise styling conveys semantic meaning. Its use supports consistent rendering across digital platforms, preserving the intended italic and bold emphasis independently of the surrounding text style.

General Properties

Code Point U+1D798
Version Added 3.1
Name Mathematical Sans-Serif Bold Italic Capital Iota
Block Mathematical Alphanumeric Symbols
General Category Uppercase Letter
Canonical Combining Class Not Reordered
Bidirectional Class Left To Right
Decomposition Type Font
Decomposition Mapping "Ι" U+0399 Greek Capital Letter Iota

Encodings

HTML Decimal Encoding 𝞘
HTML Hex Encoding 𝞘
UTF-8 Encoding 0xF0 0x9D 0x9E 0x98
UTF-16 Encoding 0xD835 0xDF98
UTF-32 Encoding 0x0001D798
C/C++/Java Escape \ud835\udf98

Unicode Properties

NFC Quick Check Yes
NFD Quick Check Yes
Numeric Type None
Numeric Value NaN
Line Break Alphabetic
Uppercase Yes
Cased Yes
Changes When NFKC Casefolded Yes
NFKC Casefold "ι" U+03B9 Greek Small Letter Iota
NFKC Simple Casefold "ι" U+03B9 Greek Small Letter Iota
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 Upper