U+1D5F1 "𝗱" Mathematical Sans-Serif Bold Small D Unicode Character

U+1D5F1 "𝗱" Mathematical Sans-Serif Bold Small D is a typographic variant of the lowercase letter "d" found in the Mathematical Alphanumeric Symbols block, designed specifically for use in mathematical notation to distinguish variables and constants from standard text. It features a sans-serif typeface with a bold weight, making it visually distinct from both regular italic and serif letterforms. This character is intended for scientific documents and equations where a sans-serif bold style is required, ensuring clarity and consistency in mathematical expressions. Its encoded position at U+1D5F1 allows it to be consistently represented across different digital systems and fonts.

General Properties

Code Point	U+1D5F1
Version Added	3.1
Name	Mathematical Sans-Serif Bold Small D
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"d" U+0064 Latin Small Letter D

Encodings

HTML Decimal Encoding	𝗱
HTML Hex Encoding	𝗱
UTF-8 Encoding	0xF0 0x9D 0x97 0xB1
UTF-16 Encoding	0xD835 0xDDF1
UTF-32 Encoding	0x0001D5F1
C/C++/Java Escape	\ud835\uddf1

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	"d" U+0064 Latin Small Letter D
NFKC Simple Casefold	"d" U+0064 Latin Small Letter D
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