What ⦇ means
It opens a relational-image expression in Z notation.
Z is a mathematical language for precisely describing software and other discrete systems. In R⦇S⦈, relation R links values, S is a set, and the expression gives values linked to at least one member of S.
Jean-Raymond Abrial’s Z work began in the late 1970s. Oxford researchers developed it, and industry used it, in the 1980s; it later entered formal-methods teaching.
Highly technical: it signals a Z specification or Z-style relational notation.
Close it with ⦈, not an ordinary parenthesis.
Related characters
1
Combination ideas
1Questions people ask
1Why 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.
More like this
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How to type or find ⦇
- Also called
- image bracket · relational image bracket · limg
- Search it as
- relational image · image operator · Z notation bracket · R⦇S⦈
- Shows up in
- Anything that takes text · its shape is whatever your font draws
⦇\2987Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.