U+1D6C5 "𝛅" Mathematical Bold Small Delta Unicode Character

U+1D6C5 "𝛅" Mathematical Bold Small Delta is a typographic variant of the Greek letter delta, rendered in a bold typeface and classified within the Mathematical Alphanumeric Symbols block. It is specifically intended for use in mathematical and scientific notation, where it represents a vector, matrix, or other bold-form quantity to distinguish it from a standard italic delta. Unlike the regular Greek small delta (U+03B4), this bold version is not intended for general Greek text but serves as a semantic glyph in formal equations and academic documents. Its inclusion in Unicode ensures that digital representations of complex formulas can preserve precise formatting and stylistic distinctions across different platforms and software.

General Properties

Code Point	U+1D6C5
Version Added	3.1
Name	Mathematical Bold Small Delta
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"δ" U+03B4 Greek Small Letter Delta

Encodings

HTML Decimal Encoding	𝛅
HTML Hex Encoding	𝛅
UTF-8 Encoding	0xF0 0x9D 0x9B 0x85
UTF-16 Encoding	0xD835 0xDEC5
UTF-32 Encoding	0x0001D6C5
C/C++/Java Escape	\ud835\udec5

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Lowercase	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	Lower