U+1D400 "𝐀" Mathematical Bold Capital A Unicode Character

U+1D400 "𝐀" Mathematical Bold Capital A is a typographic variant of the standard Latin capital letter A, specifically designed for use in mathematical and scientific notation to clearly distinguish variables, vectors, and other symbolic elements from plain text. It belongs to the "Mathematical Alphanumeric Symbols" block, which was added to Unicode to provide a comprehensive set of styled letters that allow mathematicians, physicists, and engineers to write formulas without relying on font formatting or special markup. This character ensures that the bold style is preserved across different software and platforms, making it an essential tool for clear and consistent communication in technical documents.

General Properties

Code Point	U+1D400
Version Added	3.1
Name	Mathematical Bold Capital A
Block	Mathematical Alphanumeric Symbols
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"A" U+0041 Latin Capital Letter A

Encodings

HTML Decimal Encoding	𝐀
HTML Hex Encoding	𝐀
UTF-8 Encoding	0xF0 0x9D 0x90 0x80
UTF-16 Encoding	0xD835 0xDC00
UTF-32 Encoding	0x0001D400
C/C++/Java Escape	\ud835\udc00

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	"a" U+0061 Latin Small Letter A
NFKC Simple Casefold	"a" U+0061 Latin Small Letter A
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