U+1D40A "𝐊" Mathematical Bold Capital K Unicode Character

U+1D40A "𝐊" Mathematical Bold Capital K is a stylized version of the standard Latin capital letter K, designed specifically for use in mathematical and scientific notation where bold formatting distinguishes variables, vectors, or constants. It belongs to the Mathematical Alphanumeric Symbols block, which includes a full range of bold, italic, script, and other typeface variants to provide unambiguous representation in digital text. Unlike the regular "K" which might rely on font formatting, this character carries its own semantic weight as a distinct code point, ensuring consistent display across platforms and applications when bold mathematical notation is required.

General Properties

Code Point	U+1D40A
Version Added	3.1
Name	Mathematical Bold Capital K
Block	Mathematical Alphanumeric Symbols
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"K" U+004B Latin Capital Letter K

Encodings

HTML Decimal Encoding	𝐊
HTML Hex Encoding	𝐊
UTF-8 Encoding	0xF0 0x9D 0x90 0x8A
UTF-16 Encoding	0xD835 0xDC0A
UTF-32 Encoding	0x0001D40A
C/C++/Java Escape	\ud835\udc0a

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	"k" U+006B Latin Small Letter K
NFKC Simple Casefold	"k" U+006B Latin Small Letter K
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