Mathematical Double-Struck Small X 𝕩
Visual Description: The symbol is a small x drawn with a double outline. It resembles a bold letter from a math font, but with extra strokes that create a double look. The shape is compact and sits on the baseline in most formulas, standing out in equations.
Meaning & Usage: It marks a special variable or quantity in a formula. This x is set apart to carry a particular interpretation. In teaching, the symbol helps learners see different roles for x within a single problem. It appears in symbols sets and proofs.
Historical Background: The double-struck style grew from the need to distinguish kinds of objects in math notation. It was adopted in digital typography as part of a broader family of stylized symbols. Unicode includes this form to support printing in editors, calculators, and math software. It travels across texts.
Practical Use: Use this x to mark a distinguished quantity in a formula or model. In software, you can insert the symbol via a character picker or a keyboard shortcut. It helps keep notation clean when x has multiple roles. Quick UI controls can toggle style or highlight the variable for comparisons or operations.
See our category page for related symbols.
Look‑alikes: x (U+78).
Need styled alternatives? Try the Fancy Text tool.
Confusables
Technical details
- Codepoint:
U+1D569 - General Category:
Ll - Age:
3.1 - Bidi Class:
L - Decomposition:
<font> 0078 - Block:
Mathematical Alphanumeric Symbols - Script:
Common - UTF-8:
F0 9D 95 A9 - UTF-16:
D835 DD69 - UTF-32:
0001D569 - HTML dec:
𝕩 - HTML hex:
𝕩 - JS escape:
\u{1D569} - Python \N{}:
\N{MATHEMATICAL DOUBLE-STRUCK SMALL X} - Python \U:
\U0001D569 - URL-encoded:
%F0%9D%95%A9 - CSS escape:
\1D569
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+1D569 or a built‑in character picker.
HTML: use the numeric entity 합 (hex) or 합 (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.