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( mathematics ) Denotes a closed left endpoint of an interval .
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{\displaystyle [a,b)=\{x\in \mathbb {R} \,|\,a\leq x<b\}}
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{\displaystyle \left[a,b\right[=\{x\in \mathbb {R} \,|\,a\leq x<b\}}
( mathematics ) Denotes an open right endpoint of an interval.
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x
∈
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≤
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{\displaystyle \left[a,b\right[=\{x\in \mathbb {R} \,|\,a\leq x<b\}}
]
a
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=
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x
∈
R
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a
<
x
<
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{\displaystyle \left]a,b\right[=\{x\in \mathbb {R} \,|\,a<x<b\}}
Used in [ ]
[
Used to create digraphs that substitute for letters that do not have proper Unicode support The digraphs [B, [b, [D, [d, [G, [g replace B̶ , b̶ , D̶ , d̶ , G̶ , g̶ . More documents (including official government publications) use the bracket hack than the single letters.
![{\displaystyle \left]a,b\right[=\{x\in \mathbb {R} \,|\,a<x<b\}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/741229b83677bb5ce79ab7ebaeba79b48c5d7b0c)
