What ⨧ means
⨧ is nim-addition, also called nim-sum. Convert values to binary; add matching digits modulo two, ignoring carries.
Charles Bouton analyzed Nim, a heap-removal game, in 1901. Sprague–Grundy theory, developed in 1935–1939, extended the method to other games where both players have the same legal moves. Conway's 1976 book On Numbers and Games connected nimbers—values assigned to game positions—with broader game and number theory.
Don't confuse it with
1
Questions people ask
1Why does ⨧ look different in my font?
It can: fonts draw this mathematical character with their own proportions, so the plus and subscript may look different across fonts.
More like this
9
How to type or find ⨧
- Search it as
- nim-addition · nim-sum · nim sum · bitwise XOR · XOR · nimber
- Shows up in
- Anything that takes text · its shape is whatever your font draws
Windows (Word)
Windows
HTML
⨧CSS
\2A27Windows
To type ⨧ on Windows, enter 2A27, then press AltX.
Linux
Press CtrlShiftU, enter 2a27, then Enter.
LaTeX
Use \plussubtwo if your math package defines it.
Codes and encoding1 code points
HTML decimal
⨧
HTML hex
⨧
CSS content
content: "\2A27";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%A8%A7
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.