Mathematical Bold Italic Capital S 𝑺
Visual Description: A capital S shown in a bold italic style. The strokes are thick and smooth, with a gentle slant. The curves are round and clean. The character sits tall and clear, easy to read in math text & on screens.
Meaning & Usage: It marks a variable, a set, or a component in formulas. It can denote quantity, vector part, or a label in equations. In math writing, bold italic helps distinguish type of symbol from normal text. In calculators and apps, this style appears as a quick cue for operations & comparisons.
Historical Background: This style belongs to a family of mathematical alphanumeric symbols used to distinguish roles in math writing. It grew with digital fonts and typesetting, appearing in textbooks and software as a way to separate objects such as sets and sequences. The history is broad and generic, focusing on readability and consistency.
Practical Use: In practice, you see this S in formulas, on calculators, and in quick UI controls for operations or comparisons. It helps separate ideas and keeps expressions tidy. Typing or selecting it depends on the font or tool: choose a bold italic math style, or use an equivalent symbol in your editor.
See our category page for related symbols.
Look‑alikes: S (U+53).
Need styled alternatives? Try the Fancy Text tool.
Confusables
Technical details
- Codepoint:
U+1D47A - General Category:
Lu - Age:
3.1 - Bidi Class:
L - Decomposition:
<font> 0053 - Block:
Mathematical Alphanumeric Symbols - Script:
Common - UTF-8:
F0 9D 91 BA - UTF-16:
D835 DC7A - UTF-32:
0001D47A - HTML dec:
𝑺 - HTML hex:
𝑺 - JS escape:
\u{1D47A} - Python \N{}:
\N{MATHEMATICAL BOLD ITALIC CAPITAL S} - Python \U:
\U0001D47A - URL-encoded:
%F0%9D%91%BA - CSS escape:
\1D47A
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+1D47A or a built‑in character picker.
HTML: use the numeric entity 푺 (hex) or 푺 (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.