U+1D6B0 "𝚰" Mathematical Bold Capital Iota Unicode Character

Unicode Version 17.0

𝚰

U+1D6B0 "𝚰" Mathematical Bold Capital Iota is a specialized typographic glyph used predominantly in mathematical and scientific notation to represent the Greek letter iota in a bold, upright typeface within the Mathematical Alphanumeric Symbols block. Its design distinguishes it from both the lowercase iota and the standard capital I, ensuring clarity in complex formulas where it often denotes the identity operator, a unit vector, or a specific numeral value in contexts such as linear algebra, physics, and advanced number theory. This character enables precise typesetting in digital documents and publications, avoiding confusion with similar-looking Latin or italic Greek characters, and is supported by modern Unicode-compliant fonts and mathematical rendering engines.

General Properties

Code Point U+1D6B0
Version Added 3.1
Name Mathematical Bold 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 0x9A 0xB0
UTF-16 Encoding 0xD835 0xDEB0
UTF-32 Encoding 0x0001D6B0
C/C++/Java Escape \ud835\udeb0

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