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⊷

image of

Image of

⊷ means “image of” in mathematics: for a function, it is the set of outputs produced from a chosen set of inputs. That set can also be written f(A) or f[A]. The MathML character table gives it the named entity <code>imof</code>.

Text symbol
Search it as
imof · image of symbol · image operator · function image notation · multimapdotbothB
Shows up in
Anything that takes text · its shape is whatever your font draws

What ⊷ means

It is the set of outputs a function gives for chosen inputs.

For a function f and a set A of allowed inputs, its image is {f(x) | x ∈ A}: apply f to each member of A and collect the results.

If f doubles each input, the image of {1, 2} is {2, 4}.

Don't confuse it with

4
≒
Approximately Equal To Or The Image Of
shares “image”
≓
Image Of Or Approximately Equal To
shares “image”
⊏
Square Image Of
shares “image”
⊑
Square Image Of Or Equal To
shares “image”

Questions people ask

1

Why does ⊷ 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 ⊷

Windows (Word)
Alt+XType 22B7, then Alt+X to get ⊷.
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 “image of”.
Linux
Ctrl+Shift+UType 22b7, then Enter or Space.
HTML
&#x22B7;
CSS
\22B7
LaTeX (txfonts/pxfonts)
With the txfonts or pxfonts math-symbol set, use `\multimapdotbothB` in math mode for ⊷.
Codes and encoding1 code points
HTML decimal
&#8887;
HTML hex
&#x22B7;
CSS content
content: "\22B7";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%8A%B7
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.

Families this belongs to

1

Maths & numbers1,835 symbols

1️⃣📏📐✖️➕➖➗🟰♾️#️⃣*️⃣0️⃣