U+1D546 "𝕆" Mathematical Double-Struck Capital O Unicode Character
Unicode Version 17.0
U+1D546 "𝕆" Mathematical Double-Struck Capital O is a typographic symbol belonging to the Mathematical Alphanumeric Symbols block, specifically designed for use in mathematical and scientific notation where it represents the set of octonions or, less commonly, the set of orthogonal matrices. Its double-struck, or blackboard bold, style mimics the visual appearance of a bold capital O with enhanced strokes, a convention established in mathematical typesetting to distinguish special number sets and algebraic structures from ordinary variables. While the letter O itself is not a standard symbol for the set of rational numbers or integers, this character follows the same stylistic tradition as ℕ, ℤ, ℚ, ℝ, and ℂ, offering a clear visual cue in printed equations or digital text. By being encoded in Unicode, 𝕆 ensures consistent representation across different platforms, fonts, and software, allowing mathematicians and scholars to include it in plain text without relying on specialized markup
General Properties
Encodings
| HTML Decimal Encoding |
𝕆 |
| HTML Hex Encoding |
𝕆 |
| UTF-8 Encoding |
0xF0 0x9D 0x95 0x86 |
| UTF-16 Encoding |
0xD835 0xDD46 |
| UTF-32 Encoding |
0x0001D546 |
| C/C++/Java Escape |
\ud835\udd46 |
Unicode Properties