U+1D6BB "𝚻" Mathematical Bold Capital Tau Unicode Character

U+1D6BB "𝚻" Mathematical Bold Capital Tau is a typographic variant of the Greek capital letter Tau, designed in a bold typeface for use in mathematical and scientific notation. It belongs to the Mathematical Alphanumeric Symbols block, which provides distinct styles of Latin and Greek letters to avoid confusion between symbols and ordinary text in equations. This character specifically represents the Tau letter in bold, often employed to denote variables, constants, or special functions in fields such as physics, engineering, and higher mathematics, where different font weights distinguish between different meanings or emphasize certain quantities.

General Properties

Code Point	U+1D6BB
Version Added	3.1
Name	Mathematical Bold Capital Tau
Block	Mathematical Alphanumeric Symbols
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"Τ" U+03A4 Greek Capital Letter Tau

Encodings

HTML Decimal Encoding	𝚻
HTML Hex Encoding	𝚻
UTF-8 Encoding	0xF0 0x9D 0x9A 0xBB
UTF-16 Encoding	0xD835 0xDEBB
UTF-32 Encoding	0x0001D6BB
C/C++/Java Escape	\ud835\udebb

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	"τ" U+03C4 Greek Small Letter Tau
NFKC Simple Casefold	"τ" U+03C4 Greek Small Letter Tau
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