U+1D544 "𝕄" Mathematical Double-Struck Capital M Unicode Character

U+1D544 "𝕄" Mathematical Double-Struck Capital M is a typographic symbol from the Mathematical Alphanumeric Symbols block, designed for use in mathematical and scientific notation where a bold, blackboard style capital M is required. This character is commonly used to represent specific number sets, such as the set of matrices or the Möbius strip in topology, and is distinct from the standard Latin capital M to avoid confusion with ordinary text. It is part of a larger system of double-struck letters that provide a clear, formalized way to denote mathematical concepts in digital documents and academic papers, ensuring precise communication across various fields of study.

General Properties

Code Point	U+1D544
Version Added	3.1
Name	Mathematical Double-Struck Capital M
Block	Mathematical Alphanumeric Symbols
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"M" U+004D Latin Capital Letter M

Encodings

HTML Decimal Encoding	𝕄
HTML Hex Encoding	𝕄
UTF-8 Encoding	0xF0 0x9D 0x95 0x84
UTF-16 Encoding	0xD835 0xDD44
UTF-32 Encoding	0x0001D544
C/C++/Java Escape	\ud835\udd44

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	"m" U+006D Latin Small Letter M
NFKC Simple Casefold	"m" U+006D Latin Small Letter M
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