English Dictionary

square bracket

noun

Either of a pair of symbols, [ ], used for various purposes, e.g. to enclose text inserted or replaced by an editor, and to indicate various mathematical operations.

The [square bracket] is used to enclose additional information in a sentence.

意味（1）

Either of a pair of symbols, [ ], used for various purposes, e.g. to enclose text inserted or replaced by an editor, and to indicate various mathematical operations.

We must, in short, employ a special bracket for operative relations ; and the square bracket is the most convenient. Hence [a + bβ] x denotes that a + bβ operates on x, and [φ]ⁿ denotes that φ operates on itself n - 1 times.