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U+1D7D9 MATHEMATICAL DOUBLE-STRUCK DIGIT ONE

Outlined double-struck one, blackboard bold style, used in math for the identity or indicator function and fancy text.

Codepoint
U+1D7D9
Name
MATHEMATICAL DOUBLE-STRUCK DIGIT ONE
Script
Common
Category
Decimal Number (Nd)
Unicode version
3.1
Plane
SMP
HTML
𝟙 𝟙
CSS
\1D7D9
UTF-8
F0 9D 9F 99
UTF-16
D835 DFD9
UTF-32
0001D7D9

Related characters

Mathematical Alphanumeric Symbols

997 characters in the Mathematical Alphanumeric Symbols Unicode block, from number 959.