U+1D5A8 "𝖨" Mathematical Sans-Serif Capital I Unicode Character

U+1D5A8 "𝖨" Mathematical Sans-Serif Capital I is a stylized version of the Latin capital letter I, designed for use in mathematical and scientific notation where a sans-serif typeface is preferred for clarity, such as in vector or matrix representations. It belongs to the Mathematical Alphanumeric Symbols block, which was encoded in Unicode version 3.1 in 2001 to provide distinct characters for mathematical expressions that would otherwise rely on font changes or markup. This character specifically carries the sans-serif style to differentiate it from the standard serif I and from other symbols like the imaginary unit or identity matrix, aiding in precise typographic communication.

General Properties

Code Point	U+1D5A8
Version Added	3.1
Name	Mathematical Sans-Serif Capital I
Block	Mathematical Alphanumeric Symbols
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"I" U+0049 Latin Capital Letter I

Encodings

HTML Decimal Encoding	𝖨
HTML Hex Encoding	𝖨
UTF-8 Encoding	0xF0 0x9D 0x96 0xA8
UTF-16 Encoding	0xD835 0xDDA8
UTF-32 Encoding	0x0001D5A8
C/C++/Java Escape	\ud835\udda8

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	"i" U+0069 Latin Small Letter I
NFKC Simple Casefold	"i" U+0069 Latin Small Letter I
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