What 𝓔 means
In HTML, use 𝓔; in a CSS string, use \1D4D4 .
𝓔 is the bold-script capital E. In a formula, the author defines what it stands for; its style can distinguish it from another E. A 1999 proposal described these mathematical alphabets as already used by scientific and technical publishers. Unicode 3.1 encoded them so plain text could preserve those distinctions. NFKC compatibility normalization folds 𝓔 to plain E, erasing that distinction. The exact script shape can also vary by font.
What it means when someone sends it to you
2 readingsInside a formula
An author-defined symbol; bold script can distinguish it from another E.
In a profile name or post
Usually decorative lettering; the glyph alone names no mathematical object.
Don't confuse it with
1Questions people ask
1Why does 𝓔 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 𝓔
Windows (Word)
Alt+XType 1D4D4, then Alt+X to get 𝓔.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “mathematical bold script capital e”.
Linux
Ctrl+Shift+UType 1d4d4, then Enter or Space.
HTML
𝓔CSS
\1D4D4HTML
In HTML markup, write `𝓔` as a hexadecimal character reference.
CSS
In a CSS string, write `\1D4D4 `; the trailing space ends the hexadecimal escape.
Codes and encoding1 code points
HTML decimal
𝓔
HTML hex
𝓔
CSS content
content: "\1D4D4";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%F0%9D%93%94
1
On screen
1
Code points
2
JS .length
4
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.