U+1D501 "𝔁" Mathematical Bold Script Small X Unicode Character

Unicode Version 17.0

𝔁

U+1D501 "𝔁" Mathematical Bold Script Small X is a typographic symbol belonging to the Mathematical Alphanumeric Symbols block, which was introduced to support specialized notation in scientific and mathematical texts. This character represents a bold, script-style lowercase letter X, designed to visually distinguish variables or constants in complex formulas where weight and slanted handwriting cues are needed for clarity. It is commonly used in academic disciplines like physics, engineering, and advanced mathematics, often appearing within expressions that differentiate between standard Latin letters and special symbolic meanings. The character encodes a specific stylistic variant of the letter X, ensuring that such distinctions are preserved in digital documents and publications across different platforms and fonts.

General Properties

Code Point U+1D501
Version Added 3.1
Name Mathematical Bold Script Small X
Block Mathematical Alphanumeric Symbols
General Category Lowercase Letter
Canonical Combining Class Not Reordered
Bidirectional Class Left To Right
Decomposition Type Font
Decomposition Mapping "x" U+0078 Latin Small Letter X

Encodings

HTML Decimal Encoding 𝔁
HTML Hex Encoding 𝔁
UTF-8 Encoding 0xF0 0x9D 0x94 0x81
UTF-16 Encoding 0xD835 0xDD01
UTF-32 Encoding 0x0001D501
C/C++/Java Escape \ud835\udd01

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 "x" U+0078 Latin Small Letter X
NFKC Simple Casefold "x" U+0078 Latin Small Letter X
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