Mathematical Bold Italic Capital R 𝑹
Visual Description: A bold italic capital R stands tall in math fonts. The strokes are thick and the letter tilts to the right. It has smooth curves with a strong vertical spine. The style signals emphasis and a special role in formulas. You see it in variables, labels, and quick notations.
Meaning & Usage: The bold italic R marks a value or object in a formula. It helps distinguish a parameter from regular text. In equations it may denote a variable, a name of a function, or a label for a group. It signals emphasis and a special role in notation.
Historical Background: In the history of math typesetting, bold italic letters appeared to differentiate clear objects in dense formulas. The design evolved as fonts and digital typesetting grew. This style became common in textbooks and software to show structure, hierarchy, and comparison without adding extra symbols. The idea is clarity.
Practical Use: In calculators and math apps, bold italic letters help users scan formulas quickly. Designers add quick UI controls to apply bold, italic, or both to a selected symbol. For comparisons you can label operands with such styling. The R stands out, guiding focus when you show a real number or a variable in a diagram.
See our category page for related symbols.
Look‑alikes: R (U+52).
Need styled alternatives? Try the Fancy Text tool.
Confusables
Technical details
- Codepoint:
U+1D479 - General Category:
Lu - Age:
3.1 - Bidi Class:
L - Decomposition:
<font> 0052 - Block:
Mathematical Alphanumeric Symbols - Script:
Common - UTF-8:
F0 9D 91 B9 - UTF-16:
D835 DC79 - UTF-32:
0001D479 - HTML dec:
𝑹 - HTML hex:
𝑹 - JS escape:
\u{1D479} - Python \N{}:
\N{MATHEMATICAL BOLD ITALIC CAPITAL R} - Python \U:
\U0001D479 - URL-encoded:
%F0%9D%91%B9 - CSS escape:
\1D479
How to type / insert
Fast copy: click the Copy button near the top of this page.
By codepoint: in many editors and IDEs, you can insert via the Unicode code U+1D479 or a built‑in character picker.
HTML: use the numeric entity 푹 (hex) or 푹 (decimal) when an HTML entity is needed.
Compatibility & troubleshooting
Font support: if the symbol does not render, the current font likely lacks this codepoint. Choose a font with broad Unicode coverage or allow a fallback font.
Web pages: ensure your CSS font stack includes a general fallback; avoid relying on images for common symbols to preserve accessibility and copyability.