U+1D71F "𝜟" Mathematical Bold Italic Capital Delta Unicode Character

U+1D71F "𝜟" Mathematical Bold Italic Capital Delta is a styled variant of the Greek capital letter Delta, designed specifically for mathematical and scientific notation where it represents concepts such as change or difference, most famously in the discriminant of a quadratic equation or the Laplace operator. This character is part of the Mathematical Alphanumeric Symbols block, which provides distinct, unambiguous glyphs for variables and constants in formal typesetting, preventing confusion with ordinary Greek letters or other symbols. Its bold italic form is typically used in textbooks and research papers to denote a vector or a specific mathematical entity, ensuring clarity in complex formulas.

General Properties

Code Point	U+1D71F
Version Added	3.1
Name	Mathematical Bold Italic Capital Delta
Block	Mathematical Alphanumeric Symbols
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"Δ" U+0394 Greek Capital Letter Delta

Encodings

HTML Decimal Encoding	𝜟
HTML Hex Encoding	𝜟
UTF-8 Encoding	0xF0 0x9D 0x9C 0x9F
UTF-16 Encoding	0xD835 0xDF1F
UTF-32 Encoding	0x0001D71F
C/C++/Java Escape	\ud835\udf1f

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	"δ" U+03B4 Greek Small Letter Delta
NFKC Simple Casefold	"δ" U+03B4 Greek Small Letter Delta
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